Hello bete!! Listen if your partner still having periods after unsafe sex, then there are virtually no chances of being pregnant. But just to be on the safe side, it would be wise to take a home pregnancy test. And there are so many reasons of early period, like stress, tension, or hormonal changes. Please use condom next time. https://lovematters.in/hi/resource/safe-sex https://lovematters.in/hi/birth-control/top-10-facts-about-emergency-contraceptive-pills https://lovematters.in/hi/birth-control/chosing-the-right-birth-control/morning-after-pills-instead-of-condoms-is-that-ok 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