Talking to yourself while speaking

Talking to yourself while speaking Is this even possible? I am talking about literally getting orders from yourself while talking, not during pauses, literally while you are moving your mouth. Has anyone here tried? I'm asking bc when I have a strong block, I want to get rid of the fighting and time pressure feeling, and, I'm sure that it will help me having a voice in my head saying some keywords/sentences like, "stop, you are too anxious", "reduce the speed", "brief"