Beofre stressing out about it 1st go to your local health dep. or family planning center or dr. and make sure 100% If you are you have a ton of choices to choose from, being a parent, abortion, private/ semi-private/ open adoption. You'll need to get both of your parents together and you an your bf will need to talk to them don't just tell them your pg. but also tell them your keeping all of your options open and your trying to choose which is right for you because in the end this will be something you'll live with for the rest of your life no matter what you choose to do.
If your not......Please for goodness sakes learn from this scare. Tell your bf there will be no more sex unless he wears a condom and your taking bc (CORRECTLY!!!)and stand your ground on the issue. If he really loves and respects you which I hope to god he does then he won't have a problem with it. If he whines or complains about it let him go. He wasn't right for you in that case. Love and respect go hand in hand. There is NO love without respect for each other.
I hope you take my adive in each case to heart hun. Your young and you have your whole life yet ahead of you. Your only going to be a teen once and you can never go back so don't miss out on everything there is to go through with just growing up. I hope it turns out well for you.