Hello~I am so sorry you are having all this difficulty. Since you have seen all the doctors and had all the tests and all came back favorably, I highly suggest seeing a chiropractor. You see, you may have some pinched nerves and misaligned vertebrae in your neck and back and they could be causing the symptoms you are having.
Your first visit he will take a complete history and then some x-rays, after going through the notes and looking at the films, he will then be able to adjust you accordingly. After a few treatments, you should start feeling better,.