I really like the Bob's Red Mill all-purpose flour mix (gluten-free). We, my husband, made some chocolate chip cookies with it, and they were good. They stuck to the sheet alittle, so you need to spray with pam. I haven't tried the cornbread mix yet, but it sounds yummy!
I have a couple gluten free cookbooks that are good and they have different flour mix recipes. I really like the sorgham flour too, it's texture seems close to wheat flour. Most of the gluten free bread products I find in stores are almost all rice flour, which I don't care for the texture. One of my cook books suggested to buy all the individual flours and make your own mix. That it's cheaper than buying the Bob's Mix.
I have been shopping at Whole Foods Market here in CA. If one's not by your house you can go online. They have all the different flours. You need to get Xanthum Gum also when using GF flours.
Also Trader Joe's has alot of GF items.
I'm really hoping that this gluten-sensitivity is temporary from the Lyme. We'll see with time I guess?