For me, it's completely neurological. 30 minutes after getting glutened, I have what amounts to a seizure- and this seizure can continue for hours. If I don't get to my anti-convulsants in those first 30 minutes, it's not going to work. Last night it happened in public and I fell down outside of a cafe. No one helped.
ANY level of gluten, whatsoever, sets me off. Count your lucky stars that you don't have to worry about it like that. Some of us are paranoid because we HAVE to be.