Dear, periods are sometimes becomes irregular because of stress, tension and hormonal changes also. And these are not conclusive sign for pregnancy. But if you had an unsafe sex before, first of all to assure yourself - do a home pregnancy test - morning urine sample is the best. And then please consult a specialist or a registered doctor soon. Read here also: https://lovematters.in/hi/resource/menstrual-cycle https://lovematters.in/hi/our-bodies/my-periods-are-irregular-what-should-i-do https://lovematters.in/hi/pregnancy/home-pregnancy-tests-dos-and-donts 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