Have you had days like this? I am having one today. I just feel really tight, like I'm fighting with the horn, and it sounds like it too. Really airy sound, everything over top-space E sounds and feels totally pinched. So frustrating, this is, and I was really just blowing long tones and some lip slurs to warm up. I have gigs coming up at the end if this month, and days like these make me incredibly nervous. Anyway, I'm just venting, really. Some days my chops feel great and I sound good, and occasionally, on days like these, I feel like selling every ounce of brass I have and crawling back into trumpeter hibernation. I must persevere! Does anyone else experience this on occasion? How do you work through it?