--like it could be related to nutrient deficiency secondary to your other conditions, especially the MTHFR mutation. Sometimes it takes a precipitating event to tip the scales over and start a cascade, especially autoimmune.

And, celiac/gluten sensitivity itself can cause neurologic symptoms, particularly neuropathy, not just in conjunction with the nutrient deficiency it results in (though that can occur too).

Strongly suggest you take a look at the Gluten File when you get a chance:

http://neurotalk.psychcentral.com/thread1872.html