I had my period on May 3, 2016 and I was spotting. I ve been sleeping with guy #1 for a while and on May 16, 2016 around 3am or 4am, he ejaculated in me. 4 days later, May 19, 2016 around 5am, I slept with guy #2 and I m pretty sure he did not ejaculate in me. Would I have already been pregnant within the 4 day gap? I m pretty sure guy #1 is the father.