What you are trying to do is, go back in your thoughts and relive the seconds or minutes or hours.
Exactly what the enemy wants. He will project that situation on the screen of your mind as often as you will let him. Your mind whirls with fantasy reruns of all of the things you could have done or said. Should have done or said. And all the ways the other party or parties are thinking about it and what they will do.
Most of us are not aware our worrisome or guilty thoughts of moments gone by, constitute spiritual quicksand. In fact, often our thoughts have us to the extent we are captives of the negativity, completely unaware we can discipline the thought life.
We are destroying sophisticated arguments and every exalted and proud thing that sets itself up against the [true] knowledge of God, and we are taking every thought and purpose captive to the obedience of Christ . . .
II Corinthians 10:5 (Amplified Bible)
You can't go back and change anything. You can address it in prayer and ask the Lord to teach you what you should learn, thank Him for being Sovereign over everything, and live in the Now.
You can do this because it is commanded in His Word. Often we must go to Him over and over, asking for release while standing before The Throne. We must acknowledge He could have prevented it, had that been the Plan.
He totally gets it. He was there.
Soldier of The Cross, look up and move on!