My neuro told me the same thing. My brain MRI was clear and my physical exam was not very remarkable. I asked him to do a spinal MRI and he said it was a waste of time. He was so sure I did not have MS he took me off copaxone and stopped seeing me. Within a year I was hardly able to walk.

I went to a new neuro who did the spingal MRI and found lesions on my lumbar spinal column. He put me back on copaxone and after some time I was almost better again.

Do not accept what the doctors tell you. You know something is wrong and keep after them until they tell you what it is. Go to someone else if you have to. You owe it to yourself.