Your description of your gig is really impressive, I enjoyed reading it! And, not always things turn out as wanted, and life situations requires adaptations. You already mentioned you are kinda ok how the night ended, playing a different song at the end. Best is to accept it as it is, but try to do the best possible at given situation. You may be a perfectionist, and I know what that is. The trick is to be happy with an 8 out of 10, took me a couple of decades and still like to reach a 10 with almost everything I do.