Hi my question is pertained to the use of postinor 2 and it's effecriveness. My period May 15-20, I had unprotected sex on May 30 and took the pill on the first of June, my period was suppose to come on June 12 but it didn't on so far my symptom is tenderness of the breast. Is it likely that the pill didn't work and I might be pregnant or its just due later because of the pill?? Is it necessary to take a pregnancy test? Urgently waiting on your response #worried