so whenever i play my trumpet, i warm up and play then warm down, its a daily routine. and i love it. it works great with me. but for some weird reason, one day i play really really really good, then the next i play really bad. in other words, my chops dont respond right away, and my range is horible. my tone sounds airy, and it just sounds bad. then the following day i can play really really really good again. any ideas as to why this is? or any way i can prevent those bad days??