I've been playing trumpet for 8 months now. After about 6 months in i had a range to High C, sometimes going higher. Back then i was practicing about 5-6 hours a day, doing lip slurs, long tones, and nothing much else. For the past 4 weeks, I'm barely able to hit a high G. Are my chops too tired? Did i abuse them by practicing so much? How much should i practice per day, and What should I practice to get my chops back? What can I do to get my range and endurance back? Auditions for my school Symphonic band are in a month and I need to have a solid range and good endurance so I can get through the etude cleanly.