Your daughter sounds just like me when I was her age. And...
I did smoke, drink and experiment with boys. But I didn't get pregnant or VDs, and I didn't drive drunk, because I was well-informed.
She's probably going to continue to experiment, so instead of fighting it, prepare her for what she's doing.
Supply lots of information on the effects of smoking and drinking - in the form of brochures lying around the house kind of thing.
Make sure she has condoms.
She'll come out the other side, and you won't have completely lost communication with her because you kept an open line.
Edited by rebeleducation - 3/17/12 at 8:37am