when I first went gluten free I bought a book that is a shoppers guide for the store. It lists food that is safe, it tells you what brands and such. That maybe helpful as well. I got it from the gluten free mall.
Sounds to me like you already know the answer. lol. I am in sort of the same situation(well, not the pregnant part). I am gluten intolerant and feel so much better when not on it. I FORGET this and go back to gluten and feel horrible. Go back on the gluten free diet and feel amazing again. I can understand your frustrations, its not easy having a clear cut diagnosis. I felt like it was all in my head for a while. I have found lots of good coupons for gluten free foods, and such to make it cheaper. I also make ALMOST everything from scratch to help cut the costs. Plus its healthier. Hang in there. There are LOTS of supportive people on here to help you.
I bake all the time! ESPECIALLY MUFFINS! My muffings used to burn on the bottom but, if you have a dark pan you need to reduce the temp by 25 degrees. I have found the best muffin tin is actually the Pampered Chef stone muffin. I use it all the time and they turn out GREAT. I usually bake from scratch. there are a lot of good recipies out there. My favorate is the blueberry muffins from Deliciously gluten-free by Elizabeth Hasselbeck. Hope that helps.