Oh, vomiting. I have to be very sick to vomit (it's only happened to me twice), so I've associated it with extreme illness, and when people tell me they threw up, I get scared and awfully concerned about them.
Bees and wasps. Oh lord, I can't stand being near those things. People keep scolding me for disliking bees, but I'm sorry, but they look similar to wasps and they sting, so they still freak me out. And just... the way they fly looks so abnormal to me. It's like they're hanging on strings, like a puppet or something. Just thinking about it makes me shiver. I admit that they look cool, though. In photos...
I also have claustrophobia (fear of small spaces). Even putting on tight clothing that's hard to take off makes me panic. Like, if I try on a pair of old pants and can't pull them up past my thighs, I have a quick second of panic and quickly take them off. I will actually start crying if I can't get the tight clothing off soon enough. :I