Can't Stop Replaying Terrifying Thoughts

You have to try your best to acknowledge when it's happening and to do something to distract yourself from overthinking about things that don't need to be over-thought.

I had the same thing happen after seeing something scary happen to my daughter... Kept replaying it over and over for a long while. I dont remember when it stopped but it might have been that i accepted the outcome and felt better that she is safe with me now and is fine. In your situation, maybe reflect on the outcome and find the positive thing and focus on that? Like you are alive, safe, and made it past the event. (I dont mean to sound dismissive at all, since i dont know your situation its hard to give advice I guess sorry)