Thanks, Everyone. I'm considering whether to cancel my next appt. with the ortho doc next week and find a PT, or postpone the appt. to give it more time. I don't want to go back and say I didn't take the Advil. Got a new ice pack today --- it's a gel pack that wraps around the extremity, and stays put with a strap that wraps around it. Now I have an ice pack that will actually stay on my arm so I can work with both hands!
It's a little discouraging to see the comments about long recovery and recurrence without continuing the exercises.... hopefully, I did not wait too long before seeking treatment.
Fortunately, it doesn't hurt a bit to ride, or climb.
Coincidentally, in the same week I got the diagnosis my brother had surgery on his left shoulder to replace a full-thickness RC tear, remove bone spurs, repair what could be fixed of severe tendinosis, and reattach a retracted tendon. His injury was much more severe. He's in good shape and has been working out for years, and is no newbie to the gym. I wonder if he and I share a genetic weakness in this area.