I hate doing presentations for school

I just can not do it. I practice in front of the mirror, and start crying because I'm so overwhelmed. I can barely speak to one person without getting nervous or stuttering, how can I talk in front of 20+ people? I hate the feeling of people's eyes on me. When I'm eating, when I'm writing, when I'm doing anything.

Also, my friend told me that some former social 20 AP students will be coming and watching our presentation. I can not possibly handle that. These are critical grade twelves who have already went through this course. They just seem so intimidating. Especially this girl named Kelsey. I've heard she's a bit of a know it all and tends to be harsh. Agh. D:

I don't know what's with my phobia of talking. I barely ever talk in front of my friends. I find that I'm slowly withdrawing from people, and I don't like it. Every day, even more and more words get stuck into my throat. I have so much to say, but I can't say it. Not verbally, anyway.

Mibba, what's wrong with me? >_<