I have had the day off today, and spent the day clearing the garden, tidying up etc, and realised that as I was working away, I was rehearsing over and over again a conversation/argument I may have with a friend of mine. It went on for hours. So much so that I ended up having to put on audio book to drown it out.
If I don't have anything to go over in my head, I invent other worrying scenarios and start overthinking them too. To the outside world I appear quite cheerful and sociable, but inside I just go over and over interactions ad nauseam.
Is this normal? How do I stop?