Welcome to NeuroTalk:

First off I'd like to suggest that you get your actual numerical results from the vitamin tests.
Lab results in US still go down into a very low region, and that hasn't been updated for some strange reason. Hence a reading on the lab result of 250 may say "normal", but it really isn't.
The newer guidelines recommend 400 as the lowest normal. People with neuro symptoms may need much higher levels.

Here is the B12 thread that explains:
http://neurotalk.psychcentral.com/thread85103.html

This medical website is for doctors, but is easily understandable for most laymen:
http://www.aafp.org/afp/2003/0301/p979.html

I think this first step should be clarified first off in anyone with symptoms like yours. In fact B12 deficiency is more common today than ever due to all the acid blocking drugs people take every day for heartburn. These drugs impair B12 absorption.
Also low B12 mimics MS, and in fact many MS patients improve when supplementing it.

Another factor may be gluten in food. Some people with gluten intolerance develop nerve damage that can mimic MS as well.
That would be the next thing to test out after the B12.