I had same symptoms. MRI blood test negative.
Call igenex (igenex.com) and get a kit for a lyme disease panel. Chronic/disseminated lyme is SOO common but most dr.s dont know about it. Regular tests are only 30% accurate. Get the igenex before you waste money on a million other tests and doctors. Then find a lyme-literate doctor. Google it or try the lyme disease association. I read your post and had to let you know... look into Chronic Lyme. Best of luck.