Hi BrOkEnAnGeL5915 - welcome to Psych Central. I am sorry you are struggling with getting enough rest and sleep. Self Harm, like any habit may be challenging to change.

These articles may be of interest:
I'm 4 Years Self-Harm Free

How I Stopped Self-Harming

15 Things to Do Instead of Self-Harming | Psychology Today

Hope you get the support you are looking for.