Girlfriend drug advice?

My girlfriend (16) has always seemed firm on being straight edge and sober. She had previously done some very hard drugs and made many poor decisions. As long as I had known her, she had stopped. She recently told me about finding some pills around the house and taking them out of boredom. Tonight she texted me about how she went out drinking. I know it doesn't seem like a big deal, being as it has only happened twice now, but I'm a bit worried. I've done some drugs and stuff in the past, but nothing much more than weed or booze. For this reason I'm not particularly wanting to confront her. I don't want to act like a hypocrite although I've stopped. Any advice?