Sounds like you have a good attitude. No point in worrying. Worry is wasted emotions, in my opinion.
My youngest daughter is a worry wart. She worries about stuff that has already happened...like she would worry about a test she took already. I would say...the last thing to worry about is something that has already happened. You cannot change the past.
I also used to tell her...quit worrying so much. It's not they're going to take out a gun and shoot you.