Hey TM- i just finished week 1 of a two week high school marching band program; everything is great...that is until I have to traverse from 3rd space C to the D above it (4th line D). I've developed somewhat of a break so to speak between these two notes- I've attempted doing long tones, buzzing, resting, etc but nothing seems to get me back to my pre-camp consistency. Also, flexibility and control suffer greatly when attempting to go chromatically from low C to high C- I can ascend easily- descending is another story. This has never been easy for me before (as seen in one of my previous posts), but now it's darn near impossible. The clarity, ease, and crispness of attacks has also diminished. Could any of my issues be related to a simple swelling issue?