Sounds more like Secondary or Primary Progressive MS which could cause those very problems without presenting actual flareups, just a slow progression of symptoms. I wrote about this a while ago, maybe it will help you.
http://www.mattsms.com/2011/01/4-types-of-ms.html
I too had pretty bad numbness for a while in the right side of my body (from foot to shoulder blade excluding arm). I have a very "slugish" left hand... Drives me nuts trying to type.
The numbness is pretty much gone for now but I just have a little trouble identifying temperature an quickly.sharply in my right side as opposed to the numbness.