Hello, I'm only in highschool but I love my trumpet very much and this is my third year playing. But I started to actually take is serious and started to put effort in it this year. Lately I haven't been able to hit higher notes, and I don't know why. My range is usually to an 'A' above the scale. I haven't been able to hit E(from the higher part of the scale) to A(above the scale). I'm not sure why this is happening, I'm pretty sure my trumpet is in good condition. I've asked my band director about it and he said it was just a "rough patch all brass players go through and only time will fix it." Its felt like this has been going on longer than it needs too. I practice during my lunch and study hall hour, and I'm part of extra band activities. I bring it home during most days of the week and over the weekend. I use fast air, and I'm pretty sure I'm using my muscles correctly. I also use a 7c mouthpiece, if that has any effect.
Does anyone one have any useful advice or tips? I'm starting to get stressed and upset about this, I don't want to keep going backwards.