Hi guys. I recently started playing my horn again after 15 years. I've been playing for about 5 weeks about 2-3 hrs a day. I have been concentrating on embouchure and rolling out my lower lip as I did not do that before and relaxing my jaw. I was noticing steady improvement in my tone until about a week ago when I was having difficulty playing and my mouth was getting tired very fast. I tried some softer reeds which made it slightly easier to blow but the fatigue in my cheeks is still there. I feel it in the bottom of my cheeks close to the jaw. I cannot practice for more than 5 minutes now without getting tired and having to stop. I noticed with my metal mouthpiece the fatigue is worse too (vandoren java v16 metal T55) than my runyon (custom size 8). I don't know if I just need to take time off and let the muscles recover or am I just doing something wrong?