Hard to say- could be many things. Im also head to toe in pain at the moment, but its freezing cold winter here, and to top it off i have a raging sinus infection and a bronchial chest infection, which always makes fibro pain worse. i am so sorry you are suffering, you have some very painful diagnosis.
keep you in my thoughts, and sending you healing ((((((hugs)))))))) from australia-
p.s love your quote: "find blessings in every day!" what a great, positive attitude. Thanks for sharing that!