I had mine period somewhere March 4th after My guy and I had sex when i took in Postinor 2 tablets.. But this month I have not yet had mine period. And we had sex just in the last 5 days ago and i took Postinor 2 tablets again.. I went home, and when i was sick and the Nurse said I am Pregnant. I just don't understand, i think there is a problem or mix up somewhere.. I am confused, can someone tell me how it was possible and what is wrong ?? And what i should do. Because i am sure i took in the tablets and since then i had mine period and have not had sex again.. I was expecting my period somewhere earlier in April but have not had it yet.. Please help me, I am afraid.