My period is three days late, what this means?

Hi there

If you had unprotected sex during your fertile days, you maybe pregnant. However periods get delay for all sorts of reasons - stress, sleep deprivation, crash diets, medicines, and birth control pills all interfere with regular cycle. So, eat well, sleep well and your periods will resume. If you had unprotected sex, wait for another week before conducting a clinical pregnancy test. Good luck