Hello everyone. My trumpet teacher has been having me buzz only my upper lip into my mouthpiece for the past few weeks (lower lip was apparently causing problems), and that went fine. Last week my practice time suffered, and now I can't stop pressing into my upper lip to get any real range. My sound is choked, and although it isn't painful, it doesn't feel right. I can't get in touch with my teacher for two weeks, so I just wanted to see if anyone had feedback. It's difficult to practice now because it feels like everything I play is wrong, but I have to keep playing to keep my lip up. Thank you for any replies.