I would get a second opinion before going on the recommendation of a Chiropracter. There are tests that can be done to tell you what may give you problems. I don't have anything against Chiropracters, but they often tend to broaden their scope without proper training.

I've be gluten free for about 20 years. I'm lucky as I can "cheat" a fair bit, but have done the whole spectrum from dapsone to steroid shots.

Some of the low-card bars might be ok, otherwise rice krispies and fruit snacks seems to work.