<s>[INST] I used to take contraceptive till last month got my periods on 4th october. Had unprotected sex twice after that. I have taken I pill 3 days ago with in 72 hrs of having unprotected sex. My periods are still due and m worried now. Can u advice or help. [/INST] You have written that you had unprotected intercourse twice.  On which days of your menstrual cycle did you have sex? The first and the last week of your menstrual cycle are safe periods. Sex done during that period does not cause pregnancy. Were the two episodes of unprotected sex more than five days apart? If so you should have taken I PILL twice, i.e. after each unprotected sex. If not there is a possibility of pregnancy. I PILL itself can delay the period. But if the period is delayed for more than one week consult your doctor and get a pregnancy test done as I PILL is not 100% effective. I hope I have answered to your satisfaction. </s>