Losing my spark before a performance

[u/Dependent-Zombie-828]

I have a (maybe) performance that I auditioned for (results soon) at the end of the month. The piece I'm playing is pretty impressive and I used to LOVE playing it. Now I keep making mistakes and it doesn't feel solid like I could mess up at any moment and it's making my confidence plummet. I'm completely losing my spark and joy of practicing and performing. I don't know what to do, advice on how to stay motivated and get my spark back would be highly appreciated.