Seemingy the chancs are low, - since you were still in your periods when you had sex. To top it all you took a pill. So that too may have impacted your cycle. So dont worry - but to assuage yourslef - do a home pregnancy test and calm yourslef down. Sometimes trauma upsets our cycyle too. If you would like to join in on a further discussion on this topic, join our discussion board, "Just Ask” https://lovematters.in/en/forum