Hello, I'm pretty new to the site and I thought the community would be supportive enough to give me some solid advice. I'm a Junior in High School who has been playing since the 5th grade. I've been involved in my school's concert an marching band for several years and I'm long overdue to seek someone's opinions on the issues I have. Ever since I began playing the trumpet I've had the obvious and unsurprising issue of too much mouthpiece pressure. I've never had a decent embouchure because when higher register notes were introduced to me I had no idea how to hit them other that putting more pressure on my mouth. The sides of my mouth have never been tired, just a sore, red, and swollen upper lip. Now I'm 16 and have readily scarred my top lip every time I go to a marching band rehearsal or band camp. I can't hit much over a high A, and that's on a good day. I have no clue whether or not I have breathed from the diaphragm properly because I've always relied on the crutch of pressure. I know I need private lessons to revert back to a safe way of playing, but what can I do in the immediate future to survive band camp with out permanently damaging my mouth.