This sounds so much like me it's crazy. I've had multiple times where I just got so upset and just started cutting without even realizing I was doing it. But it did help the pain go away. If I were to tell you to stop, I'd e a hypocrite, so I won't do that. But know that Someone cares for you. It's not as though your parents don't care about you, they just don't know how to handle the whole situation. Mine are the same way...overly strict and handle everything in the worst way possible. If you have to, just get away from them and try to surround yourself with friends that care for you. That's what I plan on doing once I move out.
Much love..