Hello Doctors, am stressed out because I had sex on the 23rd of Sept with my bf and I took the 2 does of postinor at the same time. I then had sex on the 25th and I took postinor 2, two days later. I have three pregnancy test at home with the home kit and it shows negative. My problem now is its been three weeks after postinor 2 and I have still not seen my period and am getting proper worried now. Don't know what to do now. Help please.