Hi Cat
I am also one of the people who has symptoms on both sides and I am also dx'd B-12 deficient.
Some neuro's are still old school and need to be a little more aggressive with their thinking and treat the patient and not the disease.
Have you checked out the NMSS website or multi-sclerosis.org website for symptoms and explanations?
http://www.nationalmssociety.org/abo...oms/index.aspx
http://www.mult-sclerosis.org/mssymptoms.html
These two websites may help YOU understand in order to help HIM understand. Asking your doctor specific questions is the first step towards dx, but also knowledge is power (for you!).
It took a while for my doc to figure out the B-12 deficiency, but I now get monthly b-12 injections which has helped my fatigue, tingling a lot. I can tell when it's time for an injection.
Good luck. Keep us posted on your progress!