All I know about MS is what I’ve posted here, and I’m not qualified to give you any definitive advice. Most of the tips in the list just improve your health and detriment bacteria. Vitamin D deficiency has a link to MS, so that’s definitely one to try.
Conventional medicine doesn’t have a great track record with chronic diseases, so it’s best to try and familiarise yourself with the research and knowledge available, experiment, talk to people who’ve had success and most importantly stay positive and committed to getting better.
I’d read the two links above with MS in the title if you haven’t already. The guy discusses the case for auto-immune disease vs chronic infection(s). It’s likely immunosuppressive drugs would contribute to candida and other infections though. Have you discussed candida with the doctor prescribing the drugs?