Welcome to NeuroTalk:

Sounds frightful. Over the years reading forums like this,
I've seen some patients with "MS like" diagnoses that had
gluten intolerance/Celiac. Also very low B12 can be overlooked and lead to terrible deterioration of the nervous system.
Often gluten intolerance is attached to B12 issues, because of the malabsorption of nutrients.

So I'd get tested for B12 ASAP if you haven't recently done so.
Do not accept "normal" from your doctor, as US has old outdated lab ranges for B12 still. If you are below 400 you need to fix that right away. This is the most common, obvious problem and a place to start.

You might want to view the video by Dr. Wahl...who has MS and found dietary adjustments were very helpful:
http://neurotalk.psychcentral.com/post844321-42.html

Look back over the past years if you can, and see if you can find a trigger...or event that started all this. With PN, history can be revealing and point to a possible life style intervention. But with MS, a trigger is less likely to be found.

Look for vaccines, trauma, infections, food poisoning, exposure to pesticides, chemical exposures to solvents and dry cleaning chemicals, family history for possible genetic triggers, drugs like fluoroquinolones or flagyl or statins, etc.