I'm 16. i was on by then had unprotected sex and he finished inside. this was three days ago. chances of being pregnant? what should i do

Unprotected sex: Hi, you can take morning after pills up to 72 hours after sex and the chance of protection is up to 85%.

Emerg. Contraception: A girl not wanting to get pregnant, but somehow got sperm inside of her 3 days ago, can take emergency contraceptive pills now. They are available at pharmacies everywhere, even those open 24 hours (pills work better when taken sooner). Or, such a girl can call her doctor for a prescription for Ella (ulipristal acetate) (covered by insurance), which works "better". A modern IUD also works as emergency contraception.