Hi and welcome,
I'm not sure why a neurological condition like MS would get on your potential causes list when your saying you don't have any suggestive-consistent MS lesion evidence and this originated whilst you were recovering as an inpatient after undergoing neck surgery, and 3 months on and your still not even close to normal functioning yet.
Honestly the more likely cause of this to me would be that it's in some way associated with the cervical spinal surgery, that type of surgery would be the logical catalyst...
It's good idea to see a neurologist, hopefully you'll get an independent second opinion on what's happened, and with the surgery being 3 months ago you'll likely need additional brain and spinal MRI's, nerve conductor tests, cognitive assessment etc etc before you have a better idea of what is going on.
Hope that helps a little.......JJ
Dizziness and vertigo can be caused by neck (cervical spine) dysfunction, which is known as cerviocogenic dizziness or Cervical vertigo, occipital neuralgia is a variant of cervical vertigo. I'm aware that occipital neuralgia is also associated with some type of vision impairments, ocular pain, and nausea so it's likely what you experienced prior to the cervical surgery is interconnected to your neck situation but i can't provide you anything more specific, sorry!
I think what you are saying is that even though this originated whilst you were recovering as an inpatient after undergoing neck surgery, your surgeon hasn't been able to find anything physically, neurologically or diagnostically abnormal to account for what you have experienced so he can't work out what the problem is...
A full spinal MRI would of been ideal to work out the health of your spine but to give you a better idea about diagnosing MS.....MS spinal cord lesions will typically still show the resulting neurological abnormality during neurological clinical exams even without a spinal MRI to corroborate the cord lesions exist and additionally, you've had at least a couple of brain MRI's over the last year or so and it's not been abnormal.
MS literally means 'many scars' so when there isn't any brain 'and or' spinal cord lesions, the likelihood of MS becomes very unlikely compared to the other medical conditions that could also account for the same or similar symptoms the patient is-has experienced......in your situation your existing spinal situation would automatically be a more likely explanation than a neurological condition like MS, because you don't have any MS suggestive-consistent lesion evidence on your brain MRI and you have a diagnostic history that 'could' account for the symptoms you've experienced prior to and after the cervical surgery.
I'm out of time, it's Christmas eve over here in OZ and i've still got a million things to do but i do hope i have helped a little bit.........JJ