I can relate. You are not alone.
Have you been checked for Fibromyalgia or some type of autoimmune condition?
I understand your pain. It is different for me now, once so very active, I can barely work. I also rely on a cane at times as walking is so very difficult.

Hang in there. You will get answers. Sometimes blood work doesn't show everything and it is a process of ruling out.

Edit:

I want to add, any chance you can, try aqua therapy. Water helps. Massage also helps. It takes the edge off.