There are more important things, and you need to focus on that. Dwelling on mistakes will not help you improve. It'll only drag you down, an you can't let that happen.
And what you did? That was no mistake. [She explains her awful word choice.] You did something good, and it isn't right that it didn't work.
voice;
And what you did? That was no mistake. [She explains her awful word choice.] You did something good, and it isn't right that it didn't work.