I started with numbness in both legs that lasted two months. After a spinal tap and a UTI, the neruologist said it could be MS. I just lived my life like nothing was the matter. It wasn't until 20 some years that I had Optic Neuritis. With my past history and unexplained eyes flashing and dizziness that an MRI was ordered and concluded that I did have MS and there were some lesions that had been there for a very long time.