Have you ever seen a doctor for this, other than your eye doc?
I did a quick google for "buzzing tailbone" and the results say either MS or prostatitis (quite the difference), but either way, you'll need to see a doctor to find out for sure. I don't know what the eye sight changes are, so I can't comment on what autoimmune disease your doc thinks you have.
Hi and welcome to the MS community,
lol I was stumped for a minute because i couldn't work out how i had missed your question coming up last week lol it being moved from a different location means i haven't totally lost the plot yet ;D
Whilst its true that 'buzzing' otherwise known as paresthesia is associated with neurological conditions like MS, there are a lot of more common causes which have nothing to do with MS, so its going to be in your best interest to keep an open mind on what is causing you these types of symptoms.
Also keep in mind your diagnostic evidence is going to point more towards or against a neurological condition like MS, so what abnormal diagnostic evidence did the first neurologist come up with eg neurological clinical abnormal test results, MRI, LP, nerve conductor tests, blood tests etc etc.
Optic Neuritis (ON) is typically the more common visual abnormality assosiated with MS and if the optomotrist or ophthalmologist didn't diagnose you but felt an autoimmune condition could account for x eye issue (" eye doctor said that an autoimmune disease was the only explanation for the changes in my eyesight.") the specific's will be relevant, cause visual issues are associated with various autoimmune conditions and what your visual test evidence is will also help point towards or against different conditions.
Hope that helps.........JJ
fyi some spinal related information that might be helpful