Reading your post made me realize some more of the things I do associated with this.
It KILLS me to watch other people do presentations in class - I get so nervous for them. My brothers are in recitals and concerts all the time and I get so nervous for them. It's just crazy! When I get nervous or anxious I pick at my fingernails and by the time I'm done watching people do stuff like that they are pretty much gone!
I can't sleep with light or noise either. People think it's funny but I can tell if there's a light on on the other side of the house because I can see it coming from under my closed door. And I always have to put a shirt or something over my digital alarm clock (regular ones drive me nuts with the ticking) cause I can't stand the glow. I remember getting furious when I could hear my dad helping my brothers with homework late at night and I'd make them whisper (which even then I could hear) Drove me nuts!