Sorry Shannon! I just realized I didn't answer your question! I was diagnosed after a brief episode of severe vertigo that left me wall walking. I was hospitalized for a few days. They eventually found lesions on my brain and spine with an MRI. I also had a lumbar puncture, evoked potentials (vision, hearing, sensory) and blood work. I had a neurological exam that showed abnormal reflexes and responses. Everything else was ruled out. I was diagnosed pretty quickly as I had pretty indicative test results.
For others, it can be a nightmare of tests and doctors. It can sometimes take years to get a diagnosis. Good luck with you.