Dear Lola sometimes period are too late because of stress, tension or hormonal changes, but if there has been any unsafe sex before, and period not come yet and pregnancy test is also shows negative, please consult a registered doctor soon. https://lovematters.in/hi/pregnancy/unsure-about-being-pregnant/unsafe-sex-missed-period-am-i-pregnant 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