If you are not thinking clearly call 911 and they will come to you and help you. You get one chance to be here and to be alive, ONLY ONE! No matter what your going through it will change.
PLEASE CALL 911 IF YOU REALLY THINK YOU COULD BE IN HARM OR DANGER, YOUR LIFE IS IMPORTANT!!!!!!!!!!
psychcentral.com they have a lot of info on a lot of stuff. Quizzes and chat rooms and all sorts of info that will help but if you are thinking about committing i'd call a suicide hotline.