My second Shingrix vaccination triggered Giant Cell Ateritis, a rare autoimmune disease. It is an inflammation of the temporal artery and is considered serious unless it is treated with prednisone. This is my story and it is probably quite different from your own. Initially, doctor thought it was Polymyalgia Rheumatica,also autoimmune. They are both treated by a Rheumatologist. If you research both, maybe the symptoms could rule these out diseases. Good luck.