I followed up with the rheumy yesterday. The rib pain had returned with a vengeance.
She does not feel, at this point, that it is shingles.
However, she feels that the lining of the left side of my thoracic cavity (pleura) is inflamed. A condition called pleurisy. There is a slight chance that it could be related to a fibromyalgia flare, which could be magnifying the pain sensations. Although, since I am otherwise feeling ok, the latter is probably not the case.
So, we can add yet another affected connective tissue to the list.
We are hopeful that by continuing the immunosuppressants, my symptoms will continue to improve.