I think I'm addicted to cutting?

I am 13, I have been cutting for 6 monthes or so and I can't seem to stop. It scares me because if it leads to something worse. I've thought of suicide and have been amited into a mental hospital, I had to stay there for a week or so. I've been diagnosed with depression and I now that could be some of the reson why I cut. Only a few people know that I cut and I see a theripist and a phyciatrits, and I take antideprestents, but it still doesn't help. My mom has tooken away all the sharp objects but I still cut myself with a screwdriver, but it dosen't have the same effect. I need help with getting over cutting...can anyone help?