Today and yesterday when I practiced, it felt extremely awkward to play. Ive been playing trumpet for about 3.5 years now so I know what sounds good and what sounds bad, what feels right and what feels forced/wrong. When I play it feels like my corners are extremely weak, my high E in the staff sounds really shallow like I am barely pushing air but I am pushing a lot of air. It feels like my teeth reformed over night and Im not used to playing like that. (Of course my teeth didn't reform) I do have a retainer I wear at night. I've been wearing it for a year now and my issue appeared two days ago. I feel like a beginner again. I know it is hard to comprehend without visually seeing me play but maybe some of you experts can suggest what's happenning. I have auditions in a month. If you live in texas you would know this as region auditions. I was hoping to only be socially awkward, not trumpet playing awkward...If you have any further questions or suggestions about my issue feel free to comment of inbox me. Thanks.