I Hate Public Speaking

I just got done with a presentation in economics. We had to create a business and present it. I've gotten better with speaking, I used to be quiet and my voice and hands and knees shook and wobbles like crazy and I got really red, hot, and sweaty. Now I'm okay during, I just get red and sweaty and stumble my words a lot. But the feeling afterwards is AWFUL. I want to break down and cry every time, but I don't want to in front of everyone. I also get REALLY shaky and sweaty and I can't breathe. The only thing I've found that can calm me down is pain. I pinch my arm A LOT and I have a pin on my backpack that I just take off and stab my arm with. It works and it's great, but I wish I didn't have that feeling in the first place... :/