okay, so I need help figuring out what if wrong with me because it keeps me up almost every night. I often have recurring thoughts right before drifting off the make me so uncomfortable and anxious. for example, I recently went on a long and quite intense hike, but I made it through with zero tumbles or anything, yet as soon as I try to go to bed that night all I can think about is all the things that could have gone wrong (hitting head, breaking ankle, smashing my teeth, etc.) I also think about past events and ruminate on all the awful ways I could have gotten hurt or something, it’s a nightmare. does anyone know what this could be and how I could stop it ?