You definitely do sound depressed. Have you been seeing a counselor? I really recommend that you talk to one. Then you can start heading back into the right direction.

You can get this work done. Just concentrate on how much better you will feel when it is finished. Can you think of some reward to provide yourself when you get a task accomplished?

Maybe you can go to a hairdresser before your prom and get your hair worked on. And get someone to help you find a dress that's most attractive on you!