Thanks, all.
MrsD - I'll repost my question on the PN forum as well. I just browsed through it looking for gluten-related threads and did find a few.

Glenntaj - I sure hope you're right and it's nerves waking up, not nerves dying off. It really does feel like things are getting worse suddenly, but I'm going to keep a positive thought.

Deb - I should have mentioned I had my B12 checked a few weeks ago and the levels are excellent, so that's not it. Unfortunately. That would be sooooo much easier than eating gluten-free. Since I'm not celiac, I don't have the malabsorbtion problems they do and most of my levels are quite normal except Vitamin D, for which I'm taking a 1x week 50,000 IU to boost it up. Coming off a long, dark, sunless winter, it's not surprising the D is low.