Originally Posted by Synnen
Be her friend.
Don't judge her.
DO NOT IMPOSE YOUR MORALS ON HER IN ANY WAY.
Her body, her baby, her choice. If you really want to help her, listen when she talks about what she wants to do, and help her if you can (looking up clinics in phone books for exams, holding her hand when she goes to the doctor, etc). Refusing to judge her, and refusing to make her choice for her, and helping with the everyday stuff that can get so overwhelming is one of the best ways to be a friend that I can think of.
If you do suspect that she is on drugs, you need to report that to an adult that can help her. She might get mad at you, but you are doing it for her own good. It isn't tattling or ratting her out if she is harming herself.
I commend you on your maturity. It takes a lot of guts to try to help a friend when you feel lost on how to do it. I wish I had had a friend like you when I was pregnant as a teenager.