I had sudden hearing loss in my left ear only as my first MS symptom. My hearing loss was apparently somewhat different than yours in that it went away very suddenly, and was "profound", meaning I lost more than 90dB of hearing in that ear. I also had very loud ringing in my ears. I went on oral prednisone within 24 hours of the loss and did a 1 week course with a 1 week taper off.

There was no change in my hearing for nearly 8 weeks. Approximately 8 weeks after it went away, I started getting some hearing back (only very high pitched sounds...the first sound I heard was myself whistling while I was in the shower). Over the next 6-8 weeks, I recovered all but about 10db of hearing (only remaining loss is in the lower pitched range). The only thing I did differently and I don't really know whether it had anything to do with recovering my hearing was that I started taking vitamin E tablets right before it started coming back.

I still have brief episodes from time to time where I have funky sounds in my ear, or where the tinnitus gets really bad, or where I get the "hum" and my hearing goes away a little. The longest any of them has lasted is about a day, and most are 5 minutes or less. I still have a screwed up sense of directional hearing (probably from the delay in nerve conduction in one ear), and the same sound heard through each ear sounds like a different pitch.

I would go see a neuro-otologist if you have one in your area. They can tell you if it is MS or something like Meniere's Disease causing the hearing loss. Good Luck! I know it is tough, but hang in there...