I had unprotected sex yesterday and he ejaculated inside me. i came off my period 15 days ago! could i conceive? i'm only 16 and really worried

Yes it is possible: You ovulate 14 days after the beginning of your last period. If you have sex near the time of ovulation you can become pregnant. Please check a pregnancy test if you miss a period. Consider birth control and making sure that you use barrier protection.

Yes: It is certainly possible that this encounter could result in a pregnancy. Any unprotected intercourse can result in pregnancy.

Sweet 16 And Already: Yes, you could conceive, so if you miss your next period by 7-10 days get a urine pregnancy test. Please remember that worrying will have done nothing for you if you repeat the same mistake again. Part of growing up is learning self control and keeping a cool head during adversity, as well as thinking ahead and making an estimate of the risk of doing certain things.OK,enough preaching.