Ask you new doctor about IVIG! It is the only thing that will reverse your symptoms if it works for you. Recent study of small fiber neuropathy with no autoimmune or inflammatory markers showed 74% improved with IVIG. That study had 55 hand picked patients. MGH now doing a double blind study to prove IVIG works for small fiber. I was almost in a wheelchair and after IVIG I am walking my dog (slowly) through the woods. A world of difference!