Alright, so I haven't been playing very long, and I recently started taking private lessons. My teacher told me i was pinching my embouchure, and told me how to fix it. I corrected it quickly, and without too much effort, but I did notice that I was using completely different muscles, and that they tired out quickly because i assume they weren't developed yet. Anyway, yesterday i was bored, and practiced for a good portion of the day, and towards the end of it felt as if my cheeks were swollen, because they were kind of slipping in between my teeth. It made it very uncomfortable to play, but i wasn't doing anything differently. Could this just be from practicing so much that I wore the muscles in my face out...?
Has this happened to anyone else?