I had unprotected sex with my partner on 5th day after i stopped bleeding. He did not ejaculate inside me, but just to be sure, i took an unwanted 72. Later, after 14 days, i had slight bleeding for 2 days, but it was negligible compared to my normal periods. I have been experiencing headache and feel like vomiting since I took the pill. Also, i have abdominal pain, everytime i eat something. Could i be pregnant?