That has been one of my biggest fears also...Especially since I have had migraines that have lasted weeks...I think my longest was 30 something days.
Anyway, I was at the physical therapists office a few months ago and at the Neurologist on Thursday and when they were doing some tests in the office they found that I have had loss of sensation on the right side of my body, more my face then arms and then legs...Well, this doctor thought it was bad enough to schedule and MRI with contrast. So, I am waiting on his staff to get back with me on when that will be. I will let everyone know when I go and what the results are. (Unfortunately, with no insurance I will be paying for the MRI :-(
I'll keep you posted!