Hoho, regarding the feeling in your throat and nose. What you describe feels like something that used to happen to me a lot if I was over doing things without proper breathing and air support. There is a sudden feeling like the back of the throat up to the sinuses are itching and air just starts leaking up into the sinuses and out through the nose. I just eased off the gas when that began happening and tried to put the horn down as soon as possible rather than risk causing any significant injury. After reading numerous posts here on breathing, I started making a conscious effort to put focus on that when I play, it helped tremendously. Dont think it has happend to me for several months. So take a strong look at your breathing and work from there. You are quite young in the trumpet world - just over a month. Have your aspirations yes, but dont try to bite off more than you can chew, learn to crawl before you try to run. Trust me, get that breathing and the other foundation fundamentals right NOW, the flashy stuff will come later, and get a good teacher as soon as you can. I wish there were teachers where I'm from and that I had the opportunity to even know about some of the concepts I read about on TM. There is soo much I have to undo and re-learn the correct things after all these years of struggle. I'm going overseas in a week's time so I'm finally gonna have a trumpet tutor - gosh I'm looking forward to that!!!!!!!