If you decide to get an abortion you should let your parents know what happened. Its not easy I agree. I had gotten preg. By rape. Abortion never crossed my mind, I miscarried, but I had alot od depresson problems from this, and tried commiting suicide. Its never a good thing to go through something that hard without anyone. If your parents knew what happened they would understand what your going through. Abortions arn't cheap, you'll need to have your parents pay for it. It's not like you can get a job and pay for it yourself. You have a living baby in your tummy, and if you decide to terminate his/her life, you can't wait forever. I'm not one to agree with abortion, but this has its exceptions. I'm sorry this happened to you. I really am, but you need to be a big girl and tell your parents and the police. This could happen to another person.
Your selfishness for not contacting the police or your parents could lead in another girl getting raped and pregnant. Also, not taking care of yourself while your pregnant, can be life threatening. I suggest you stop drinking and smoking right now, its not even healthy for you when your not pregnant.