I believe MS is infection related. In particular I believe it to be the 3 B's. Babesia, Bartonella, and Borrelia (Lyme). Why do I believe this? Because in my hands right now I have blood test results with positive results from all of these tests. These tests are from someone in my family that was diagnosed with MS 15 years ago. With antibiotic treatment slow improvement is happening.
When you indicate SWEATING, this is one of if not the most important and obvious indicators of BABESIA. You should look into the 3 infections above, educate yourself about the controversy of lyme and read Dr. Burrascano's guidelines. And by the way Lyme patients are getting CCSVI treatment also. I hope I helped cause it would have been nice if the MS doctors or anyone who knew about this controversy helped me. I'm serious look into it and also have another person look into for you.
I haven't got my "theory" down yet but I do believe infect may play some role, I am looking into the Epstein bar virus however because I had a really bad infection in hi-school, my aunt had it twice, and now she has lymphoma...
I tested for lyme and did not have it however I still have a really "aggressive" case of MS.
My advice besides seeing a doctor asap would also be to look into different viral possibilities however, I would not say that a virus is the ONLY cause, I beleive that it could be a combination of issues, viral, genetic, etc which would explain why such a wide array of treatments can help different patients but again I don't relay have my theory down yet.
Just get into a doctor and make sure your foot isn'tt calling off! Seriously, if it feels tingly that's could mean impaired blood flow to your foot...