I am so sorry you are going through this. I have an excellent family doctor. She diagnosed me with an AN after I answered a few questions for her after falling..........she confirmed it with an MRI and an MRI/ with contrast. She read the radiologists report and said, "How long have you had MS?." I said, I don't have MS." She showed me the scans and then ran some more tests and said that according to my medical history it had been on my previous doctor's "mind" for quite a while, but he never ran the rest of the tests to be sure. I am in and out of "remition" with it and do everything she and my neurologist ask of me and so far so good. I am a candidate for power chair now, even though I am still mobile. I can't do some of the things I would like to do, but I can still do a whole lot.
Good luck with your tests and stay positive.
Hugs,
Brenda