Healing is a wonderful thing. Since my visit with the Orthopaedist, I have been steadily recuperating. Shockingly, he affirmed the diagnosis from the Urgent Care doctor -- my left shoulder rotator cuff was the cause of the problems.
While he gave me several treatment choices, he prefers to treat this type of injury very conservatively, which I really like. He recommended giving it more time and extensive physical therapy -- basically the same guidance that the Urgent Care doctor gave; I just didn't have enough confidence in the original diagnosis to risk making things worse.
I have been exercising my shoulder with excellent results. While motion is still painful, I now have almost full range of motion back. It is so exciting to feel the progress. I think there is a good chance that it will heal completely without surgery.
My ribs have been healing steadily, but slowly; they are now mostly healed.