Once when I had both shoulders shot up with cortisone (pre-diagnosis, pre-Molly's knowledge) the doc said it "might" make them worse, very much worse. Mine did OK, but I wonder if you go back to the person who gave you the shot and ask/tell them what they would recommend. Obviously Doc's know these things can go south, maybe they are trained in treating adverse reactions.
Prior to the shot when you said your pain was coming from a pea sized area is EXACTLY what the "trigger point therapy workbook" talks about. Those trigger points can cause an unbelievable amount of pain. pressure while rubbing with short strokes (1-2 inch) 12 strokes at a time, several times a day is what is recommended for releases the trigger point/knot.
I agree with the relaxation/ice/heat/thinking positive thoughts. Sending hugs and light your way. Good luck and enjoy the art.
-Donette
