I dropped out on a $250k scholarship bc of speech class and now I'm going back and I'm horrified..

I dropped out on a $250k scholarship bc of speech class and now I'm going back and I'm horrified.. Hello, So I don't know what my problem is. I'm around my boys, the family, out to eat, whatever and I don't stutter at all. Nobody knows I stutter (they do but you wouldn't know by just meeting me). As soon as I'm called on or have to present in front of people, I get this extremely tense feeling in my body and can't get a single god damn word out. I literally only stutter when I think about it, so I don't know if I actually have a "stutter" if that makes sense? I took economics back in freshman year and I was told I had a 30 minute presentation on a product I had to design. I said fuck this I'm out. Now I'm going back because I want to go to law school. I am horrified. Maybe I just have severe social anxiety infront of tons of people? Idk Anybody have tips? Does this happen to anybody else? Who has went to college and how did you deal with it? \*EDIT: I'm 21 now\*