Off the top of my head, ObsidianRomance (http://archiveofourown.org/users/ObsidianRomance/works) or fatebegins (http://archiveofourown.org/users/Fatebegins/pseuds/Fatebegins) over at AO3 have some awesome mpreg stories. And billysgirl5 has a huge list of mpreg stories here (http://billysgirl5.livejournal.com/308189.html).

Thanks!

You could give More Than Words a try.

I totally recommend this!!! sooo awesome!!

Yay! Thank you!

Mpreg comes in a lot of different flavors but I tend to like the more plotty stories where unexpected pregnancy leads to a relationship and love:

Hunter's Lullaby (http://archiveofourown.org/series/59023) by etoile_etiolee (Wincest)
An encounter with a witch leaves Dean in a disturbing predicament. The relationship he shares with his brother will be put to test, and everything he thought he could control in his life will be changed forever.

Starsky & Hutch Never Had to Deal With Water Retention (http://bunnymaccool.livejournal.com/100434.html) by bunnymaccool (Wincest)
Post series AU-ish, A powerful old witch casts a spell to create a child of heaven and hell. It takes Dean a couple weeks to figure out just exactly what she meant by that, and by then he's got to deal with morning sickness, convincing Sam and Bobby that he's actually 'in the family way' ... and telling his own brother that he's the baby daddy. Then it's nine months of Bobby becoming a mother hen, Sam going all Alpha-male crazy ... and, oh yeah, dealing with a pregnancy that might actually kill him.

The Shattered One (https://www.fanfiction.net/s/7874835/1/The-Shattered-One) by MissAnnThropic (Destiel but so good!)
When it struck Castiel, it dropped him out of the sky. He set down the first place he could find. He stood in a field in Switzerland, swaying on his feet and staring down at his body, dazed by what it had just done.

Ooohhh excellent! Thanks so much!

Red Like Blood, in Veins of Blue, of course. It's on AO3 here (http://archiveofourown.org/series/152633), but its LiveJournal home (http://rlbivob.livejournal.com/) has more of the core fic. It's a MafiaBoss!Jensen/PregnantCollegeKid!Jared WIP, but there's a good 90k+ to it already and Jared has just given birth, so that's up for reading.

Also, since I can't help myself and other people might not mind A/B/O dynamics, I've got to rec Instinct by HigherMagic (http://highermagic.livejournal.com/17862.html). Jensen is more the injured party in this one. Jensen/Cas, side of Jared/Gabriel. Pregnant!Jensen. Give it one chapter and it'll steal your heart.

Um... The Razor's Edge (http://archiveofourown.org/works/679158?view_adult=true&view_full_work=true) by phantisma. Really lengthy (70k) and plotty, like the others. Humans only. Contains both pregnant!Jared and pregnant!Jensen, though Jared's more the main character and injured party. Against his will, he enters a government program designed to keep humanity from extinction, but although Jensen welcomes him as a newcomer, it doesn't escape his attention that he's essentially a prisoner. Then he's kidnapped, and suddenly, the high-tech government facility doesn't seem so bad.

Thanks, will give all these a read!

An Unexpected Love http://angels3.livejournal.com/40403.html
Summary : Grief stricken over the death of his brother, cynical movie maverick Jared Padalecki did the unthinkable - he sought comfort in the arms of his brother's fiancee. The morning after, they both realized their mistake and left for their separate lives. Only Jared can't forget Jensen's soft lips and beautiful eyes. Even as Jared was beginning to think he had to see him again, Jensen came to him.
Jensen was pregnant with his child. His - not his brother's. Jared knew he wanted Jensen more than he'd ever wanted any other woman or man.
First he had to marry him.
Then he had to make Jensen love him.

Baby Steps http://samdean.archive.nu/viewstory.php?sid=347

Awesome, thanks so much!

Here's a few other folks might now have mentioned...

* In Good Time, All Things Come (http://archiveofourown.org/series/39603): There are three things you should know about Sam right now: he's still crazy, he's one of the only survivors in a Leviathan-led zombie apocalypse, and, oh yeah, he's pregnant with an incest parasite-baby-thing. And no, this isn't a guess-which-part-is-a-lie game. When you spend your days being chased by the brain-hungry undead and your nights fighting with your stubborn brother about your new-found condition, you're forced to learn things about yourself. And maybe, with a pinch of luck, you might be led to a happy ending. But considering Sam's a Winchester, that road seems like a fat chance. (This is two stories, "The Father, the Son and the Zombie Spirit" and its sequel, "Kingdom Come.")

* The Killing Moon (http://poisontaster.livejournal.com/231867.html): The demons left a parting gift - a plague that killed off most of Earth's women and made some men able to bear children. Men like Sam. Now the government has seized control, and any man classified as a breeder has to have an assigned keeper and bear young to keep humanity from dying out. Dean, under an assumed name, is Sam's assigned Custodian. If only they can get over being brothers, because if they can't, Sam will be reassigned.

* Games We Don't Want to Play (http://archiveofourown.org/works/697938): When Sam leaves for Stanford, he doesn't realize he's taken a little bit more of Dean with him than he thought. When Dean shows up seven months later, will the brothers be able to find each other past the hurt and miscommunication?

* The Seahorse (http://memphis86.livejournal.com/125317.html): Everything is going fine for Dr. Jensen Ackles, a successful 3rd-year resident in obstetrics and gynecology at Grace's Heart hospital in San Francisco. But when a 22-year-old art student shows up at claiming he's pregnant, Jensen is completely certain he's crazy. After a bunch of tests, a sonogram and a bizarre story about having invoked the wrath of a ram-headed Egyptian fertility god, it turns out that Jared Padalecki isn't joking: he really did get knocked up! And when Jared insists on having an OB-GYN of his own gender, Jensen's long stretch of successfully not falling for one of his patients is finally at an end. Note: There is now a sequel, Palace of the Brine (http://memphis86.livejournal.com/220443.html), as well!

* Tattooed Jensen verse (http://moviegeek03.livejournal.com/38148.html#cutid1): When Jeff dragged Jared away from his books to some party so he could hook up with a girl, Jared fully expected to have an awful night. Little did he know that the night would change his life...as well as the hot guy with all the tattoos who he couldn't stop staring at.

* The End Is Just the Beginning (http://archiveofourown.org/works/835809): Jared had everything a teenager could possibly dream of, a loving family who adored him and perfect grades at school. But after he got sick and his mother dragged him to the doctor the life as he knew it didn't exist anymore. With the assistance of his doctor, Jared finds a way to start a new life; it's hard, but he's working towards his dreams.. and then he meets Jensen, an attractive but closeted knight-in-shining-armor who rescues him from an attack and turns the rest of his life into chaos.

* Stay verse (http://archiveofourown.org/series/62413): Jared is a devoted dad, first and foremost. A night out's something long overdue in his agenda, and that's exactly when he ends up in a club where he meets a guy who tickles his fancy. Probably more than he'd like to admit. Probably, maybe. But he can't stay.

This last one is a Samifer/Destiel AU, but it features a huge amount of hurt Dean, and I think it might appeal to you very much.

* Tread Softly (http://archiveofourown.org/works/1105416): AU - Dean and Sam grew up on the road with their travelling mechanic father. Dean took care of Sammy and Sam in turn was the voice of his selective mute brother. Until the fateful day that CPS caught up with them and Dean disappeared from Sam's life. The memory of his deceased brother drove Sam to achieve the best in his name, until another fateful day during winter break when Sam discovered John had lied. Dean wasn't dead. John had abandoned Dean in the Arkansas Care for Indigent Carriers. But now that Sam knows, he's going to get his brother back.

Wow! Amazing rec list thanks so much!

These are J2-

Everything by http://hemrage.livejournal.com/23399.html
Some can be dark though so read warnings

Lingering Effects. http://archiveofourown.org/works/493247

Jensen has one goal in mind when he goes to the club; lose his virginity. The consequences of that one night will change everything.

Always expect the unexpected - same premise as above, different story
http://archiveofourown.org/works/495968/chapters/868374

Kiss from the sun. http://archiveofourown.org/works/943699/chapters/1841255
Summary:

Playboy Jared Padalecki doesn't remember meeting Jensen Ackles but when he claims to be carrying Jared's child, Jared automatically believes him and swears to take care of the child and the man carrying him. As he takes on the fragile man, he learns there is more to Jensen then meets the eye.
Jensen fears Jared but fears his ugly past even more. He's also determined to protect his unborn child no matter what the cost.

As Jared begins to fall for the beautiful man, everything seems to be working against him. Can Jared get Jensen to fall for him or will his nightmarish past, poor health and the baby that brought them together cause them to be apart?

Fire in which we burn. http://archiveofourown.org/works/2220333
Jensen is a high class prostitute, and a good one at that, until he decides he want out. Still, using Senator Padalecki as means to earn enough money to quit leads to more than he bargained for.

Dean/Castiel - angels among us. http://archiveofourown.org/works/1323451/chapters/2754565
Cas and Gabriel are two angels living among the human race. Michael has decided to make use of the angels drawn to human life, ordering them to play host to the few nephilim unable to make permanent homes for themselves. These hunters are forced to live nomadic lives as they protect humanity from evil. Two of these nephilim roam into the angels' town and they're forced to provide them with a place to stay... only days away from Heaven's nesting ceremony. The Winchesters are unlike any nephilim ever created, blessed by the two most powerful angels and able to unbind the seal on their wings by sheer willpower alone. Michael fears that willpower will also unbind the seal over their angelic abilities. To keep that from happening, he tries to force them into nesting with a more powerful angel beneath his command. The only problem is... the Winchesters have found interest in their hosts, who are most definitely not under Michael's thumb.

Leaving footprints - Dean/ Sam with a twist. http://archiveofourown.org/works/866250/chapters/1662211
“I want a normal life,” Is usually the song that Sam sings, but what happens when Dean joins in the chorus? Unlike Sam, Dean keeps his desires to himself because even though everything and everyone they’ve ever loved had been lost to hunting, he knows that no matter how much you want to, it’s impossible to stop when you know what’s out there. Unbeknownst to Dean his silent pleas have not fallen on deaf ears, but have been heard by the people he’s loved and an angel who needs to make things right with the Winchester brothers. Soon the results of a simple spell have the boys on the path to the normal life they both crave.

Dean/Sam the humble pie http://archiveofourown.org/works/991760/chapters/1957960
The Trickster decides to take the matter in his own hands about the future apocalypse. The only way he knows is to give to the Winchesters something else to live for other than John's vengeance, Sam's plan of rebellion and Dean's desperate need to keep the family together.

Edited 2015-05-25 11:10 am (UTC)

Um...Ok wow! Thank you so so much!

Feel like I rec this one everywhere I post, but -

You can't do better than compo67's PUNZEL verse, for its humor and its schmoop and its hot sex and all the problems a pregnant Jared is afflicted with! Plus, there are a blue million chapters to it, so it will keep you busy!
http://archiveofourown.org/works/1106133/chapters/2225578

This is how it starts: Jensen is a ride operator at the Storybook Land Canal in Disneyland. His day changes unexpectedly and he ends up outside Goofy's House with a lost little girl and a pregnant coworker.

ALSO: Compo67's epic It Takes a Lot of Water - very long, very dark, very graphic, very abused!Jared. (Also very worth it, in the end.) "Reads like a/b/o" she notes, but it's not - more like The Handmaid's Tale, a very dark, alternate universe.
http://archiveofourown.org/works/877759/chapters/1687559

This is an AU where humans are split in two categories: powerful, dominant Masters and submissive, fertile breeders. First breeders and second breeders occupy each household in a precarious balance. This is Jared's household and his story. Reads like a/b/o.

Edited 2015-05-25 03:27 pm (UTC)

Thanks so much! I've got tons to read...yay!!!!!

Three MPreg directories for people who feel like they've read everything:

Supernatural MPreg Directory (http://spn-mpreglist.livejournal.com/), sortable by who's pregnant.

Hardcore Fiction MPreg Directory (http://spn-hardcore.livejournal.com/558230.html).

And the ever-popular BillysGirl5 MPreg MasterList (http://billysgirl5.livejournal.com/308189.html).

Happy hunting, all!

Gah thank you!!!

My bigbang from a few years back fits, I believe. It's here (http://tebtosca.livejournal.com/101278.html)

Oooh yay! Thanks!

Oh my god, I can't believe it. I have been looking for this fic for *months*. I thought I'd mem'd it, but foolishly hadn't. I am a very happy camper, and have squirreled it away in its own little tab to be read the *instant* I post my BB. I'm smiling so wide, you wouldn't believe. I don't know if I left FB at the time, but I *loved* it. Thank you!

WOOT! I'm glad you liked it, especially since More Than Words is the fic that got me into the forced mpreg trope in the first place! <3