Explaining Anxiety

I just tried explaining my anxiety to someone why I don't want to get up in front of the class to do something and that person was just like you just gotta stop being antisocial and we all have to do things we don't like. It's not just that I don't like it ,it's that I have anxiety and I feel like I can't breath and I'm on the verge of tears and I feel like I'm gonna make a fool of my self in front of them and I just think of the worst things