Hi..I just found out I am pregnant. I am concerned because I was with two different partners on different days near my ovulation day  The first day of my last menstrual period was August 16...it ended on August 20th. I took a plan B pill on August 24. I had unprotected sex on August 26th with first partner but he did not ejaculate in me. On August 29th I had sex with second partner and he did ejaculate in me. My ovulation day was August 30th. How can I find out which act of sex got me pregnant?