have your normal MD do the full boat of blood work for the low level stuff like...vitamin levels (most of us have low D) make sure your B12 is up to snuff. That your tyroid if doing well, and that your Lyme is sent out. Get an ANA to check for Lupus and such while in the basic care (less expensive) office. Let him do the leg work.
Then take all of your tests, results, and profiles, (dont forget your personal journal) and head to an MS center. These guys are pro's! They are very good at staring this disease in the face and either declaring it, or finding another cause for your troubles. There are more than 100 diseases that can mimic MS, including lesions! scary when you think about it.
I do hope you feel better, and get some answers. ON is tough to deal with, but its a huge indicator of MS. I would get to a clnic for your initial dx.