I have had the whole variety of illness. I don't know where you live but ask doc for a Lyme disease, or Rocky Mountain spotted fever test. There are two tests, My Mind Is fluffy now but like a western blot test and the other normal one. Also if you responses are normal ask your doc if he/she is willing to do a test run on doxiycline or miniocycline. I would ask for rheumatoid tests as well as other tests checking for MS etc. Maybe a MRI with contrast? I am so sorry for your pain.