Hi Lolad, welcome to NeuroTalk.
I noticed that noone jumped right in here and it's probably because we don't have an answer to your questions.
If you are suspicious that you may have MS, the possibility is certainly there. B12 deficiency can cause MS like nervous system symptoms. As far as I know, B12DEF. doesn't cause MS, but you can have both at the same time.
If your Neuro hasn't yet ruled MS out, then perhaps he/she will do further tests in the future.
Thanks for posting here and you are welcome here.