It comes down to the basic fact that I can't control other people, places or events. They are going to happen whether I participate or not.
People die and I can't do anything about it. Trauma can happen and I can't control it. Bad news comes and I can't stop it.
So why worry about it all the time? The only person I can control is me. I can control how I react to life and to other people. That is really all I can do.
The rest I turn over to my HP and let him handle it. Out of my hands into his.
Have you ever gotten so frustrated you yelled "I GIVE UP". It is like that, but actually give up. Don't keep taking it back. Leave it. It is not your job to carry it around.
Worry gets us no place. It only robs us of the joy you may have in today.