hi kally i suspect the motivation for referral to ms clinic is to help decide among possible reasons for a spinal cord lesion. one answer is ms but there are others. the location(s) of your lesion(s) may help clarify.
for example my own lesions were thoracic and cervical (aka classic b12 deficiency lesions - as a long term vegan with a history of associated b12 deficiency this finding made a lot of sense.
when i had my first serious attack there was a computer glitch at my doc's office which meant the neuros failed to spot my poor b12 history as part of the diagnostic picture (also i had other signs which the docs did not believe were consistent with b12 issues - they were correct as it turns out, i had a whole array of issues and b12 was only one of them).
there may be important clues to the origins of your particular lesion based on its location and your bigger overall health picture.
as for figuring out nutrients and supplements - is bloodwork a possibility in your case? there are a few 'usual suspect' nutrients out there that tend to be not great in not only ms patients, but in a lot of people, with different sets of health impacts depending on heredity and lifestyle. testing can help you figure out where your particular gaps and opportunities might lie.
glad you're here and taking positive action on your own behalf - it's important
if you're interested re nutrition, you can find some more detailed info by following my signature links, below.
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com