I self harmed for the first time in months
Why would you engage in self harm?
Because I'm not fucking perfect!  My parents made me feel like I was worthless.
I'm glad you opened up to me about it, because being able to talk about it is the first step towards getting help, which you should do.  It's definitely unhealthy to hurt yourself like you did.  Get some treatment!
Nah, I'm good now. I don't hurt myself anymore.
Okay, I'm glad that you have gotten over that desire.  When people treat you unfairly, you should remember that it is their bad judgment, and that it is not in any way your own fault.  If you ever feel like hurting yourself again, please come back and talk with us first.