Hi! Thanks for choosing HCM for your query. Taking birth control pills or minipill (progestin-only) during early pregnancy there is slight risk of low birth weight baby, preterm delivery or congenital urinary tract abnormalities and there is also a possibility of ectopic pregnancy (the fertilized egg gets implanted outside the uterus, usually in a fallopian tube). First get the urine pregnancy test done, if the pregnancy is confirmed, visit a gyne doc for her/his opinion regarding the possible harmful effects of post coital contraceptive pill that was taken, Hope your doubts have been clarified. A feed back is highly appreciated.