Firstly, if you haven't made sure your cuts are clean you should.
Secondly, maybe you should talk to your parent about the pressure they are putting on you to get a job. Maybe you could start showing an interest in finding one which might ease the tension a bit? A good way to start is just print off some CV's and send them to a few shops in a town near you - at least then you are being pro-active.
Try not to worry too much about your teacher or school work, hopefully if you explain to your teacher about the fact that you can't do your assignment properly they will sympathse and give you some extra help.
Finally, suicide is not the answer, it never is. There's a good post
here[link] that you should read before you contemplate suicide. It really is not a solution. Do you have a counsellor or someone close to you that you could talk to about this? It often helps to have someone to talk to face-to-face. If not, or if you just need someone to speak to, my PM box is always open.
Sorry this post has ben a bit all over the place - but I hope I've helped a bit?
Stay safe sweetheart.