Welcome to the forum...

MS can take a long time to diagnose; keep a symptom journal-dates of onset and remission of symptoms. Also keep a record of all tests run, and get copies of reports if you can.
Was your MRI with contrast? was it a T3 machine? these two things can help show more specifically what's going on in the brain and spinal cord. Did you have an MRI of the spinal cord?

Try to be patient, I know that this is difficult because you want to know what is wrong and you want to treat it asap. Many of us have taken this journey, being told it's migraines, psychological, etc.

Do some research based on symptoms, but try hard not to become obsessed...life will pass you by and you'll waste time thinking of what could be wrong and not trying to live the best life possible even with symptoms.

Keep us up to date; any questions, or just venting, is welcome here...