Mazing had some good advice. I'm not sure I can really add anything other than to urge you to reach out to someone. Is there anyway your parents could get you set up with a therapist? I could not have quit cutting if it had not been for my wonderful counselor at the time. Be kind to yourself and take care. It would also be best if you got rid of your razors, etc. Make it harder to do and try to start over with not SIing. Good luck to you.