Sometimes people may make a mistake when using birth controland it doesn’t work correctlyOr perhaps a person was sexually assaultedand no birth control method was usedThere are some things that a person can do after they have had sex and either didn’t use condoms or other birth control or the birth control method they used didn’t workEmergency contraception (EC)which is also known as the “morning-after pill,is a medication that can help prevent pregnancy when taken up to five days after unprotected sexThe sooner it’s takenthe better it works to prevent pregnancyAnother option to prevent pregnancy is to have a health care providera form of birth control called an intrauterine device (IUDafter unprotected sexIf a person may have been exposed to HIVpost-exposure prophylaxis (PEPis a medication that can be taken within 72 hours after unprotected sex to reduce the transmission of the STD HIV.