i used to think there were no triggers either. maybe it's just something you aren't used to thinking of as a trigger? if you wanna tell us more about what happened when it started (were you out of the house? in the house? running errands? etc?) maybe we can act like your T.

I know that traffic, parking lots, and driving in general are triggers, so i try not to run errands by myself unless i have to, or i'm incorporating an errand i REALLY want, like going to a craft store.

Sometimes the smallest things can be triggers.