yes it is scary, and i am sorry to hear of your friend diagnosed with MS - my thoughts go out to her. I think that for those of us with numbness, MS is the first thing we think of - at least, it was for me, so i do understand your concerns.
I think the diary will be useful to chart what days the numbness comes and the severity etc along with any other symptoms. you may find that it is worse at certain days of the month etc. which will give more clues as to how to treat it better if it continues. the fact that the migraines and dizziness are improving is encouraging news, and the night sweats are just another indication, along with the numbness that your system isnt quite right yet, but it's getting there! take care, and keep in touch:) x