Lately I seem to be having too many bad days. I'm 67 and although I've never been a high note player, I have managed to play my Dixieland music quite well. My lips feel puffy, and I seem to need more air for my notes. My comfortable range has always been an A just above the staff, but now that's a struggle. Long note warmups seem to make matters worse. Is it a case of age catching up with me? Any advise would be greatly appreciated.