I'm trying to self-diagnose a problem. I've only been playing for less than a week, and I think the root cause of the problem is fatigue-related. Anyway here goes: 1. When playing higher notes (for me right now, that is toward the top of the staff from E to G) I can feel my throat clenching. I think I'm unconsciously trying to create extra back-pressure. Maybe this is an artifact of having played French horn for so many years. What can I do to relax it? I've tried moving my jaw forward but that doesn't seem to do much. Filling up with a lot of air helps, but then I can't play soft and I feel like I have less control. 2. When I'm tired, which right now is after about 15-20 minutes of continuous practice, some air starts escaping up through the holes from my mouth to my nose. I don't know what those are called (I thought they were the eustachian tubes but now I'm not sure). I remember this being an occasional problem when I was straining at the top of my range before (my range was at least an octave higher then, but anyway). An annoying side-effect of this is nasal drainage down my throat while I'm playing, which means lots of distracting coughing and swallowing. Ick. Am I just pushing myself too hard, or is something seriously wrong with my technique?