 [ Symptoms ] i forgot to take my birth control on saturday & sunday on friday i had sex and the condom fell off what should i do [ Disease ] one possible course of action if you live in the us is to visit your pharmacy as quickly as possible and pick up plan b plan b is the name of an emergency contraceptive medication that is available without a prescription to women over age 15 you must ask a pharmacist for it and show proof of age plan b works by either preventing ovulation the release of an egg or by interfering with fertilization of an egg do not confuse plan b with other types of prescription emergency contraceptives that induce a miscarriage that is not what plan b does at all if you have any questions consult your pharmacist he or she also can tell you if it is safe to resume taking your birth control pills you may also wish to consult your health care provider as soon as possible to go over what happened what you did and get back on track with your birth control pills if you frequently forget to take your pills keep in mind there are other methods of contraception available to you including depo provera injections and intrauterine devices iuds you may wish to explore one of these options with your health care provider best of luck to you