2) I know two fics by morgana07 on ffnet, they're awesome.

Fangs and Fury
After another fight, Sam goes out to cool off when Dean gets jumped by vampires looking to use him as bait or food. It's up to Sam to find his brother before he's turned or killed & he's forced to call upon the last person he ever wanted to ask for help or risk losing Dean again. *Hurt/limp/angry/sick!Dean; Protective/concerned/worried/furious/limp!Sam (Benny's here as well)

http://www.fanfiction.net/s/9366261/1/Fangs-and-Fury (http://www.fanfiction.net/s/9366261/1/Fangs-and-Fury)

Dungeons and Chains
After finding a clearly confused and not fully with it Sam chained in their new dungeon, Dean soon begins to learn why his brother's scared of the chains and also why Sam's so determined to stay chained up as something from Sam's year alone returns to try to claim him no matter who has to die. *Limp/ groggy/in shock/hurt!Sam & Over-protective/angry/worried!Dean. (OOC Amelia too)*
http://www.fanfiction.net/s/9340757/1/Dungeons-and-Chains (http://www.fanfiction.net/s/9340757/1/Dungeons-and-Chains)