On friday, saturday and sunday I had some serious allot of playing with my "grown up" band, we had to play Quintessence for a qualification. Well I think I played too much and now I suddenly can't hit any high notes anymore. And I have a huge concert to play with the youth band at a competition where I'm going to play the Funky Brass solo and all that... It's just strange and I don't know what to do, I have allways been good at the height.. Does anybody know why this happened to me? Thank you.