I'm sorry you aren't doing well right now. There are lots of things that can mimic MS and sometimes a dx of MS as well as other illnesses can take some time. Keep a journal of your symptoms as it will help in the diagnosing process.

At this time, it seems as though your dr. are not finding any clinical symptoms that correlate to any specific disease/illness. The only thing they can chalk it up to is stress/anxiety. Anxiety attacks can hit at any time, whether we feel calm or not. Anxiety can also cause all sorts of wild symptoms. Check out this link that lists something like 100 anxiety symptoms (hair loss is one of them). http://www.anxietycentre.com/anxiety-symptoms.shtml

Grief could definitely be contributing to some of your symptoms or exacerbating an underlying condition. Everyone grieves in their own way and in their own time. You can always see a grief counselor who can help you through what you are feeling.

Remember, keep a journal of your symptoms, i.e., date/time, what the symptom was, and how long it lasted. This will really be helpful when you go back to the dr. Let us know how you are doing and how the MRI went. I hope all goes well for you and they are able to dx you quickly so that you can be treated accordingly.