Hello dear I understand your concern You had sex on 12th day of period and took postinor 2 on same day. It will highly effective in preventing pregnancy, upto 95 % effective in preventing pregnancy. So chance of pregnancy is around 0-5 %. Discharge could be due to side effect of postinor 2 as it contain high progesterone. But it may cause earlier period, delayed period by 1-2 weeks and excessive bleeding can occur. I would suggest to go for blood HCG test 10 days after unprotected sex to confirm pregnancy. Blood HCG test is more accurate test to confirm pregnancy as you have irregular period Avoid stress, take healthy diet, drink plenty of water, maintain proper pelvic hygiene and do regular exercise Hope this may help you Contact further if follow up needed Best regards Dr. Sagar