Tyler133

Happened to me also when learning high. You will get it at some point. Just try to not do the exact same thing over and over but adapt, maybe tongue position or practice your breathing technique from time to time also.

Just sounds like you hit a plateau. It's a normal part of learning. Make sure you're not damaging your throat (if you think your tone is getting worse, you could be pushing too hard), relax, stay hydrated, stick with it.