Are you sure there is no cross contamination? Did you totally clean out your kitchen? Get rid of anything that might have gluten on/in it? Wooden cutting board? Toaster? Tub of butter or margarine? Peanut butter, jelly, condiments? Do you have a shared kitchen?
And even if you did do these things, a week isn't a very long time. It can take a while for the damage to heal. Just try to keep your diet as clean as possible and for the time being eat only whole foods such as plain meat, fish, vegetables, fruits, brown rice, etc.
I share a kitchen with my husband. But we're very careful to not CC my food; Separate pans, utensils, counters.
I don't really eat PB, bread or jelly, and I bought all gluten-free condiments. I ate at Applebees on Sunday, but this pain is in my intestines. I know I could just be healing, so maybe is part of the process...
I eat a pretty whole foods diet, so I guess I'm doing all I can