Distract your mind with something else, if nothing else seems to help

If you feel overwhelmed by the horror movie, try distracting yourself with snacks or a calming activity. Something that distracts your mind and your body, like knitting or playing with a puzzle, can be especially effective for calming you down. You could also leave the room for a few minutes and take a breather, then come back when you're ready to watch it again. If you don't want to watch the movie anymore, there's no shame in turning it off or leaving the room until it's over.