i took postinor 2, 17hrs after unprotected sex then the next one 12hrs after the first one. It was on the 9th day after my periods. My cycle is at times irregular but around 25 days. I did not spot and was ok the first week. The second week after, my breasts are tender and am feeling nauseated and kind of sick, though my periods are not yet due.Does the postinor affect the cycle or am i be pregnant?