My triggers tend to flare up most at night before I go to bed, or in the morning when I leave for work. Did I checked the hob is off, is the fridge closed, did I lock the door? Did I close the windows? What if I left the iron on and it falls over and starts a fire the house burns down with me inside it?
It's amazing how the mind can "catastrophize" mundane situations.
I live alone which probably makes it worse, but it doesn't affect me too badly during the day.