I slept with someone on oct 31. The whole wk after that, I slept with my guy. According to my last period, which was two wks before oct 31, I should be due mid july. I had my first ultrasound n they told me according to babies size, I conceived nov 9 and am due aug 1. Hoping and praying its my fiances and not the guys with whom I made a mistake. What do u think?