First I want to say that I have some good news. Following the advice of the doctor in our band, I have been applying an ice pack for 5 minutes three times a day. This morning I was able to play a soft low C to high C. Not pretty , but a sound just the same . Now I have laid down the trumpet for at least 2 weeks and will play nothing. After the rest period I will start rebuilding my embouchure.
As for the discussion about my endurance. Look, I am 83 and didn't play for 50 years before coming back in 2016. I could easily play 3 hours or more gigs in my younger days and I had good teaching to start. I followed that good teaching when I started playing again. In many way I can play better than when I was younger. But age affects endurance and if you are sensible (and I wasn't ) you will play within comfortable limits. I happen to play first trumpet ( not lead trumpet ) in a band that is a cut above most brass bands in this part of eastern Canada, so the material is demanding. But the band has allowed me to tailor my playing to my abilities without hurting myself. I caused this injury through my own stupidity.
And, Doc, thanks for those article. They are eye-opening for sure.
And thanks to everyone else, like Dr-Mark who also gave of this time to help me. Both doctors here knew what they were talking about, as did the doctor who plays in our band. I am on the way to recovery.