I'm midways through my sophomore year of marching band at the collegiate level and I've been noticing my embouchure is changing for the worse. I used to play almost completely centered but now it's moved over quite a bit to the left. I wouldn't care normally but it's definately affecting my play; not so much tone quality or endurance but mainly range. I've tried sliding it back over to a more centered area where it used to be but the muscles aren't built up anymore I guess and I might as well be playing on the complete side of my mouth. Any suggestions for fixing my embouchure? or should I just stay the same and hope I develop the same as I could used to play? Not really sure how long it would take or what to do, help would be appreciated. Thanks.