I have the same problem. I have to learn 3 songs for cello, that I got about a week ago. I would have studied them if I knew I was going to play them for my concert, which is May 9th. I learned the easiest one, but I need help with the rest. I also have to wear a dress to the concert. I found one with shoes, which is a miracle.
The only problem is there are no other cellos in the song I'm playing. And let me tell you it's very hard to play a song you learned yesterday, in a sea of voilins.