Composers Club (pre-performance)

In composers club we have been having a lot of issues lately because not everyone in the club are fully committed. We are going to have multiple performances soon and i am very nervous. We barely remember any of our early songs and since some people have quit we need to reassign the parts and even rewrite some parts. One of the other members and I have written a song but we have to figure out the harmony, beats, chords etc. while we are also trying to learn all the old and new songs. Now also since so many people have quit we have less people for each part which also makes them harder to sing. I am very nervous and stressed and I really do hope that we manage to pull our performance together. I also hope that I manage to not get stage fright and lose my voice half way through the song like I have in the past. This is very scary.