Hello everyone, I'm in need of some help. For the past few years of trumpet playing, I've been playing with too much pressure at the mouthpiece. More recently, it has gotten to the point where I can hardly buzz a distinguishable note on the mouthpiece without using a fair amount of pressure. I'll only be playing for around 5-10 minutes, and a very noticeable red impression will have already appeared on my lips where the mouthpiece was. naturally, as I play longer, the impression deepens and reddens further. I've been working on establishing a firmer embouchure, but I still can hardly play without a fairly large amount of mouthpiece pressure. This is killer on my endurance, and it always takes my chops a long time to recover. The lack of endurance brought on by the pressure is further becoming a problem, as this year I'm a section leader for the marching band, and this is my second year as a member of the advanced jazz band, not to mention the pressure is unhealthy for my lips. I don't really know exactly what to do about this problem, and any help would be much appreciated.