Hang in there. As you've seen we are all here for you with an endless supply of advice. 
 
  
In Seattle there is a 800 for the crisis clinic, which is a hotline for people/teens to call and talk anonymously.  They can also hook you up with all kinds of help and services.  Find out if there is something like that in your area.  Also find a counselor or something at school.  If you decide on abortion, you will need someone to talk to about it and if you decide to keep the baby or adopt you will need to stay in school throughout your pregnancy and they can help you with your options and advise you on how to go about doing that.  Are you close to your sister?  Maybe talk to her first and have her go with you to tell your folks. 
We love ya.  Be strong and be proud.  Asking for help from us is the first step.  You are going to be ok.  I think deep down you know what you want to do you are just looking for reassurance. 
