<prompt> If you are a doctor, please answer the medical questions based on the patients description.mamsir, today i had unprotected sex around 3pm with my boyfriend, he came ejaculated in me. Nearly after 3 hours5:45pm i took unwanted 72. I took it for the first time. After sex i also went to toilet to pee and washed a little bit. I am in very much in tension now. 2 hours later i also had headache. Should i be worried? I dont want to become pregnant. What should i do now. What care should i take to not to become pregnant. Normally my period was about to start on 4 april and its 28 march today. please help me. If this pill fails, what will happen?, How will i know?,and what shoud i do to avoid pregnancy? Please someone help me as soon as possible.  <response>: Hallow Dear, Unwanted 72 is a very reliable emergency post-coital contraceptive when taken within 72 hours of the unprotected sexual intercourse. You have taken the pills within 3 hours of the sex. So you should not be concerned about the pregnancy. Usually, a few days after the consumption of these pills, there is some amount of bleeding for a day or two. Not an issue to be worried about. Even the following menses may get delayed by few days to a week or so. This is a known phenomenon. I feel, you should not be worried about pregnancy. Stress also delays the menses. If your menses are delayed for more than a week, you may perform pregnancy test on overnight early morning first urine sample. If at all there is pregnancy, it can be easily terminated by Medical methods up to 9 weeks of gestation. I hope this removes your stress. 