yeah, i know how you feel about not wanting your parents to know about it... really the only thing you can do is talk about it to a close friend that you trust wont go telling your parents, but its hard to get help without them knowing, i think that eventually they will find out.. it would just be easier to just sit down and talk to one of them or both about everything that had happened so they can help. but really you cant get much help without them finding out sooner or later.

best of luck