I've got it bad. I have been home-schooled for two years, and don't really socialize with a lot of people, but after this summer, I'll be going back to public school. I'm terrified. It's like, I'm constantly worrying about what other people think of me, I can't act right around people, and I end up saying stupid things I don't mean to say. Sometimes I just want to hide in my room forever, and I would if it weren't for my parents dragging me out any chance they get. I'm desperate because at this point, thinking about going back to school actually makes me want to vomit.
I'm really desperate and I've got a month before school starts back.

Sound like any normal teen, they all feel like they say or do the wrong things, you just go and do it.

Also it is not the homeschooling, since you say your parents drag you out to places, it sounds like you just don't like to be around people, It is possible counseling may help, have you discussed this with your parents