Everytime you feel like cutting, maybe you could find something to do with the same energy/anger release, seriously, i know it sounds real silly, but like take up a new hobby, something to get loadsa energy out. It might not seem like it, but you have total control over yourself right now, and if you begin to cut again, you lose that control, because you can't stop, not the other way round that people tend to look at it all the time. Cuttings a vicious circle, and once you start THATS when you lose control. I understand what you mean about not being an attention seeker also, i think it is so much easier to talk to people you don't know about this sorta stuff, and i know saying something in the first place...to ANYONE, doesn't matter who it is, is something. Maybe, chat to a really trustworthy friend? And then move on to your parents later, and yeah, perhaps consider seeing someone about it, less doctors, and more counciller(sp?) perhaps (Maybe its just my real hate for most doctors, and their inability to diagnose anything correctly without google-ing it.) But thats probably the best advice i can give im afraid.
Also, about the paranoia, you said that not much bad stuff's happening in your life right now? Well, usually, when you've got nothing to worry about, you pick at the little things...things that you wouldn't usually get paranoid/anxious/worry about, i have the same thing :] Maybe not as serious as you do, but because everythings so good for me, im laying there at night dreaming up something to get worried about. It might pass, but if not, like i say, best bet someone who knows all about that sorta stuff