Hi King and welcome! If I were you I would find a Neuro Doc and get another opinion, maybe one who specializes in MS? From what I know and read MS lesions may not always show up right away on MRI's. All the MRI's I had were with contrast. I am no Doctor but you should get checked out. Theres alot of other tests that are run to rule on MS ( mostly to rule out other things).
Has your Doc said MS is a possibility? MS mimics lots of other diseases and thats why it takes so long to get diagnosed w/it. Don't give up searching. You may also want to check out the MS Society website. Lots of good info there to look at and it may even help direct what your next move should be. But I'm sure everyone in this forum would agree that your welcome here as long as you need us. Theres many in here who have symptoms but are in limbo yet with the diagnosis ( and most likley do have MS). Good luck to you and let us know how you fair.