It does look like MS. According to the McDonald criteria, for a diagnosis of MS, you'll need two clinical lesions (clinical lesion means evidence of a neurological defect found by the neurologist) and two attacks.
http://www.medhelp.org/health_pages/Multiple-Sclerosis/Diagnosing-MS---The-McDonald-Criteria-revised-2005/show/370?cid=36
Take a look at this article. Unfortunately many neurologists rely on the MRI rather than a thorough neurological examination. My neuro gave me a cursory examination, then scheduled me for a spinal tap.
If your neuro does, ask for fluoroscopy, as it will make the draw less traumatic. It's also possible that you'll need a blood patch. If you have a bad headache after the spinal tap, let your neuro know.