I’m sorry you are having so much unexplained pain. There are several diseases and conditions that have symptoms that are similar to PMR, including fibromyalgia and vasculitis. It also could be Covid related. Have you tried prednisone? Some people do have PMR in the absence of the usual blood markers for inflammation. You might ask your pcp for a course of prednisone to see if it relieves your symptoms. I wish you luck in your journey and I hope you can find some relief soon. Be sure to keep us updated.