There are so many diseases that mimic MS. You'll need more than an MRI to dx. If you truly believe you have it you'll probably need to go to a Neurologist who specializes in MS so that they can monitor you and administer more testing....some of them invasive.....like the LP. You don't necessarily have to have an LP for a diagnosis but some Neuro's insist on it. If you're having sx you might want to begin a journal and keep track of each sx and when it happens so the Neuro can see a pattern.