I will start by explaining what I am going through. I am on vacation!!! as such I haven't played much trumpet this past week and a half to two weeks. (I play professionally). Over the past couple months leading up to my vacation my playing was suffering. I was doing much more practicing than before in my off time (staying after work etc). I noticed that my embouchure was slipping to an older embouchure I had in high school where I played with very little upper lip. I had recently changed that over the past couple years. But it is creeping back. I was trying to change it but it was difficult Over the past couple days I've been returning to practice to get my chops back up for work. Only THIS time I am being more conscious about my embouchure. I found that after waiting a week or so it seemed easier to get back to my normal playing embouchure. Now my chops had a chance to rest for over a week and I find it easier. Does this make sense to anyone? Could it be because I was going full out and found it difficult to change in the heat of all the work I was doing?