It might benefit you to look at the reasons why you're self-harming. I would suspect that there might be multiple reasons why. A therapist can also be helpful in this aspect. I know you are reluctant to get help, but it would benefit you. Posting on PC does have its benefits, but it can only go so far. Having a professional's input is important, because they may see things about you that you haven't yet realized.

I hope you're feeling better soon.