I was just diagnosed with a Vitamin D deficiency and over one year ago with auto-immune Hashimoto and a month ago with Meniere's Disease.  I think you are right with an auto-immune you never know what can and will go wrong and I could of written your aritcle myslef right down to the letter.  I feel for you I am in the same boat with many specialists and no one seeming to look at an integrated solution or care plan.  I have my 20 year physician retiring in January and I am contemplating a good internist that I can go to since I am already diagnosed.  I also have a degenerative disc disease in the spine for neck and mid-back and this is where my numbness resides specifically in the right spine to shoulder blade.  I just saw your posting from February by chance and thought I would write.