I just came back home from my summer vacation, and I haven't been playing for a month. The thing is that when I picked up my cornet and started playing it felt so awkward, I sort of forgot how to form my mouth when placing the mouthpiece on my lips. It feels like the mouthpiece is big and it's not comfortable at all. Oh and I can't play in the high register either, normally I can play in the high register for hours. I have a very important audition with Manger Musikklag on tuesday, where I'm gonna play for them and they will decide what seat to put me in. I need some help on what to do, and what exercises to play until then!