Happens to me all the time! I play the Alto Sax, I play like an export at home, and at school, I get SOO nervus, I want to like scream, my hands get sweaty and my troat swells sometimes, but heres what helps, don\'t look at anything except the music, drink a little bit of water before you play, make sure the reade is comply wet, and only think about the music, it helps SOO much for me, I ope it does for you!