Dear if your wife had 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. Please use condom next time. And for these symptoms, like headache, urinal problem or dizziness, please consult a registered doctor - it's perhaps because of fear and nervousness or more than anything else. Read here: https://lovematters.in/hi/pregnancy/unsure-about-being-pregnant/unsafe-sex-missed-period-am-i-pregnant 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