Question: When the late great Luciano Pavarotti sang, was he constantly listening to himself, evaluating, and making adjustments based on how he felt at the moment? Or, was he totally consumed with the dramatic impact of the music?
What is your strategy for the day of the big performance? Are you already anticipating playing it safe and second-guessing yourself? Don't plan to fail. Prepare to perform.
Assuming all of your detail work has been thorough, you are now in a very enviable place! A great percentage of your playing was detailed and analytical. Now you have earned the right to totally perform. Don't drag the practice room onto the stage, and don't be listening to yourself. Just play!