Any social interaction with anyone other than my family and best friends (like... two people there) :'D
That and schoolwork that I'm not confident with
I we get these US History assignment whenever we watch a movie, and we have to like, critique the movie
and I avoided doing any the whole first semester and got a D
And then I decided I really, really don't want that to happen again and finally did it, though I nearly had a panic attack the whole time
I should have been able to do it in less than a day but it was giving me so much anxiety that I had to do it in short bursts :'D

So that one thing
and things like
Being in a room (esp. a small space like a tiny room or elevator or w/e) with only one person (a stranger)
Group Projects or asking for help when I'm in a room full of people I don't know, but they people all know one another
Mistaking someone for someone else and waving to them or saying hi to them
thinking about the love life I'd like to have someday (sometimes)
Going out on my own at a street or something that's particularly shady (without my pocket knife esp)
just general social anxiety kind of things :'D