Sounds like very classic OCD-type behaviour. I sometimes find myself thinking about such moments, or other instances in which I embarassed myself, or something to that effect, and actually speaking to myself out loud as if I was back in time...back at the time when such an event was happening. Just one of those classic OCD/anxiety-type things.

Hard to say what to do. Eventually, the feeling will probably wear off, or at least it will to the point where you won't feel it so much. A CBT approach would be to habituate yourself to the feeling...that is, find a nice comfortable place where you'll be safe, and run the thought through your head until it doesn't bother you anymore. But this is NOT something I would prescribe without knowing more about your situation...that's something you'd need to work out with a therapist or counsellor. I was just explaining how the process works, so please do not take what I am saying as gospel.

I can sympathize with your situation, though. Happens to many of us all the time.