So I am currently trying to build my upper register, but whenever I got higher, even up to G above the staff (which is the tip of my comfortable range on a good day), I notice my throat closing up, very tensely and I can't seem to relax it. I am trying desperately the taa-eee effect to arch the tongue up when going higher, but my throat still closes up, and then once I release myself from the trumpet, I often let out a large exhale. I understand higher notes equal faster air, but that combined with the pressure on the mpc is just hindering me to end, and frustrating me a ton. I get pissed off when practicing because it seems that no matter how I try to relax my throat muscle, it just tenses up and any note above and including, say fourth space E is a pain to reach. I am trying to build my range up to a high C above the staff, at least for now, then build it further later, but that C is my short-term goal. It seems that a large quantity of air is struggling to get through, even though I am arching the tongue, and trying to consciously use my diaphragm to push the air faster. Perhaps I have developed bad habits over the years which never got fixed? I am only a senior in high school, so I'm no pro, by far, but I feel like my range should be at this level by now. I practice long tones, lips slurs, and selected exercises from Clarke Studies two and three daily as a warm-up. With the long tones I go from middle line G all the way down to the low F#, and recently I tried going from middle line G up to the high C above the staff after the first set of long tones. Sometimes I have a great day and can screech out the notes leading up to, and including the high C, but not for long, and often tire myself out quickly during those stretches. My whole reason for this thread is, however, to ask how to not clench my throat so much when trying to play higher, because it also feels tense and hurts a bit even after I play, often for quite a while after too.