Pain In Wrist, Legs, Lower Back And Abdominal, Swelling Wrist, Brain Lesion, Diagnosed Fibromyalgia. Suggestion?

I was diagnosed with fibromyalgia but am not sure of this diagnosis. I have swelling and pain in both wrists, pain in legs when i sit for too long, lower back pain, cannot sleep thru the night and am extremely fatigued, plus right abdominal pain that goes around into back area near kidneys. I have a brain lesion where brain hemispheres meet, however no lesions on spine and visual test was fine. Have not had spinal tap to see if I have ms. Overal pain in body almost all the time. Concerned it is ms