Sorry to hear that, Ron. Things have been feeling a bit stiff for me lately, but I’m just coming out of that now and am feeling better again. Never have I experienced what you’re describing.
Were you putting in a lot of volume of work (time) or were you playing excessively loud or high, more than usual? Perhaps you just overdid things.
I always find some soft playing, Clarke I, with good air but soft dynamics does me some good, FWIW.
Best wishes to a fast and full recovery!