I had a period of fairly morbid thinking around the time I was in a serious car accident, days after my 18th birthday. I spent a few weeks in terror of getting

I had a period of fairly morbid thinking around the time I was in a serious car accident, days after my 18th birthday. I spent a few weeks in terror of getting in a car. When I saw someone driving unsafely I would have minor flashbacks to the accident, which I barely remembered consciously. I moved past it by forcing myself to confront the fears directly. That was easier in my case than yours, since it had roots in a very physical phenomenon. I don't have any advice for you necessarily, but you're definitely not alone in your thinking. Maybe one piece of advice - it could be worth talking to a therapist about the possibility of depression. I'm not convinced that is the case by any means, but it's often a very subtle and insidious condition that can color your thoughts.