I need advice/help--I had unprotected sex on Sept 16th,which was the very last day of my period(very little to no bleeding)no birth control was used due to certain reasons, he did that inside. I went and got Plan B on Sept 19th. It was about 80 hours after. I've been reading that most females that have taken Plan B started bleeding or started their periods after taking it--I have had neither one. So no bleeding, I've been getting headaches that started a week after the incident, bloated and sometimes sick to my stomach. Could I be pregnant? What is the percentage that Plan B worked 80 hours afterwards? When should I take a pregnancy test? Should there have been some sort of bleeding after taking it? Please I will appreciate any advice or insight.