Ok, first off I want to say i've been playing trumpet for 4 years. The problem I'm having is that whenever I play relatively high(an E in staff) w/o much pressure (I personally think I use ALOT to play) I get a growl from my throat (like in my throat) and it hurts. It only happens when I try using Air to play trumpet. It only happens when I DON'T use pressure, and TRY using air. Any Ideas on what it is, and how i could possible fix this? (If you need to know, my bottom lip sometimes goes inside my mouth while playing, and my highest possible note would be a B flat above staff. Lastly, People tell me I tense up sometimes when I play, but I don't feel like I'm tense.) Please Help me, Thank you.