I always find that to really get something done, you need to enjoy it, and I also always find that, even with things you really don't enjoy, like PE, which no-one likes (

), if you just throw yourself into it, you do much better.
It always helps to pace yourself, and less work at short intervals is much better than trying to do it all just to get it done with.
And since it's a week, you can look at how much work you have to do, and divide it approximately into seven, which is remarkable little!
Overall, though, you are a highly skilled (and good looking

) musician, and even if your work is naff, it will be so much better than everyone else's, and that's what counts!