I have only been playing trumpet for about a month, with very little prior brass experience (a year of french horn in middle school). I think I am still trying to figure out proper form in the embouchure, playing high notes, but the problem I've noticed the most is with my air. I have noticed that when I try to play what I consider high (I struggle with a tuning C currently), I have a strange flow of air. While it seems I could be directing the air all through the horn, I get a strange rasping in the back of my throat and even sometimes can feel air "squeeking" in my nose. The back of my throat also feels very tense, and I feel pressure in my sinuses. I've noticed this wish notes as low as the G below tuning C. Can anyone tell me what the problem may be? I did google this, and the only answer I found was a clarinet player who had been raising their tongue too high. This may well be my problem, but I find that I naturally tend to have the tongue touching the roof of my mouth, and while I can force it down behind my teeth, I actually NEED it on the roof of my mouth in order to play higher than a G or so, depending on how I set my chops. Thanks!