Thanks for all of your replies. This staying GF is NOT easy! All of you seem to think the curry powder is the more likely culprit, except for Myst. I don't know what the buckwheat brand was, unfortunately, I tossed the bag after I stored it in one of my containers. I suppose cross-contamination could be a definite problem with either of them, the flour or the spice mix.
Have any of you had problems with buckwheat? The info I found had it on the safe list, but with a caveat, that it might sometimes cause problems for some people. I may give myself a week or so to recover, and then do a test, trying each individualy, and see if I react .
Hugs,