I'm 100% gluten-free at home, but when I eat out I try to do as best as possible though I bet some slips in from time-to-time, so, no biggie.
But try this: Go gluten-free for two weeks, assess how you feel, and then try introducing gluten back ad-libitum. See how you feel.
I tried that and it was what convinced me.
"The cling and a clang is the metal in my head when I walk. I hear a sort of, this tinging noise - cling clang. The cling clang. So many things happen while walking. The metal in my head clangs and clings as I walk - freaks my balance out. So the natural thought is just clogged up. Totally clogged up. So we need to unplug these dams, and make the the natural flow... It sort of freaks me out. We need to unplug the dams. You cannot stop the natural flow of thought with a cling and a clang..."