Arjck
Most DEFINITELY talk to your therapist. You need her help with this. No one can hurt you more than your hurting yourself right now. Maybe she can give you some advice on how to talk to your parents.
From what people are saying here this is a difficult drug to get off. You'll need a Doctors supervision. I would NOT try this on my own.
We're all proud of you for posting here. Stay strong and get the help you need now while your so young. Best of luck to you.