My boss made one small comment about my report today, and here I am at 2am running it on a loop. I've replayed the moment a hundred times, rewriting everything I should have said. It was minor, probably forgotten by everyone but me, and my brain keeps picking at it like a scab until sunrise.
More people experience this than they realize.
A single piece of criticism keeps you awake replaying it for hours.
If this sounds familiar, the Library can help you find the bigger picture.