Pregnancy Risk After Unprotected Anal Sex: What to Do

Question
my boyfriend and i had anal sex without a condom and his penis slipped around when trying to get it in. that was about 6 weeks ago and i haven't started my period!what do you think my chances of being pregnant are? i'm 16 and i really can't be pregnant! i was wondering if it would do any good to take alot of birth control pills...(i had done that before, instead of using the morning after pill) would it help to prevent the pregnancy, even kill the baby if its already there? and is there anything else that i can easily do at 16 without having an abortion? ANYTHING!

Answer
You need to take a pregnancy test. Either go to a clinic or get one for home. If you are sixteen and do not want to get pregnant until any condition, then you need to get on birth control and use condoms EVERY TIME! Not using them is just asking for trouble.
Dianna