Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

This is a major part of my anxiety along with catastrophizing, so I am there with you. I don't want to think of these painful things but then end up obsessing over them.
It might help to tell yourself that these thoughts are just thoughts. They are not reality. You can't control them and they cannot control you.
Thanks AMC that is exactly how it is for me but the thoughts just won't stop and they weigh me down so much.