Hi and welcome, what you describe doesn't sound like a neurological condition like MS to me, "Neck pain, lower back pain and burning thigh pain and numbness both thighs mid and outer" could be suggestive of a structural spinal issues (eg slipped disc, disc degeneration, stenosis etc) and impinging the peripheral nervous system....the upper cervical spine (upper neck) is associated with inner ear disorders, vertigo, tinnitus, head and ear fullness, migraines, nausea etc etc etc so a spinal issue could be one possible explanation for what you've been experiencing.
Hope that helps.....JJ