I often do. Not always due to mistakes I have made during my day...But I think of things I said during when I thought nobody was close by. Words I spoke to another and wonder how he/she might have taken it differently than how I wanted it delivered. Too often my thoughts become verbal. They are not simply in my mind.
@Carla1951 I understand what you are going through. I sometimes feel this way. It's so difficult to let go when these kinds of thoughts come into our minds. Now, whenever this happens, I tell myself, I'm not the only one. This calms me down and helps a lot.