I had my last menstrual period November 25th, 2017. I had unprotected sex with an ex Dec 4th, I ovulated the 7th, I had unprotected sex with a friend on dec 7th, and my conception date is Dec 9th, 2017. My first ultrasound was at 8 weeks and 5 days, my due date is September 1st,2018. Im really confused as to who the father is, can anyone help me figure it out? Thank you.