I agree with Kiya, please stop. Stop now while you can. Adding a poor coping response, one that will in the future need to be stopped and a better coping skill put into it's place, is not something to be doing knowingly.

I'm sorry you are feeling so worthless or numb or in pain that you wanted to try this. See if you can find other avenues of expression of your feelings rather than something that can go terribly wrong, and at best very difficult to live with or stop later.