I'm so sorry you are going through all of this. It's so frustrating and we have all been there.

Anxiety can manifest in many ways. Hair loss and body zaps are some of the anxiety symptoms. Check out this list: http://www.anxietycentre.com/anxiety-symptoms.shtml I'm not saying it's anxiety but you mentioned unresolved grief and thought I would put this list out there for you to check out. The list is extensive and I know I've posted it here before at some point.

Yes, your thyroid may be causing some of your symptoms as well. A follow up with an endocrinologist might be helpful as they are specialists in this area.

Check that you don't have other deficiencies that may be causing your symptoms.

Of note, a rheumatologist only treats rheumatic diseases such as arthritis, rheumatoid arthritis, lupus, etc. There are other autoimmune diseases that are treated with others specialists, such as an endocrinologist as I mentioned above. Discuss with your PCP which specialist he/she feels you need to see for any follow up.

A neurologist can "send you on your way" if you don't have any clinical symptoms of a neurological condition. I had lesions on my brain and no clinical symptoms and was not diagnosed right away. It took about 3 years for me to get a definite diagnosis. An MRI can and usually does change over time. New lesions can show up, others can become smaller, and some just seem to disappear only to reappear on another MRI. They are a great diagnostic tool but not the only one. There are people who go years without a diagnosis and others who never get a definite diagnosis. We have a family friend that spent the majority of his adult life with some sort of neurological condition that they were never able to diagnose. He eventually passed away and they never knew what was wrong with him. It does happen, but not that often I don't think.

Another great and informative site to check out and help you get a better understanding of MS is http://www.my-ms.org. It is one of the best sites I have come across since being diagnosed. There is a ton of information on there and it may help you in understanding your symptoms. I highly recommend this site to anyone in limbo, newly diagnosed, or even old timers. It's a great site.

Also, has your dr. discussed any sort of symptom management while you await a diagnosis?

I hope you start feeling better soon.