Hello im 21 weeks pregnant my due date is sept.14th 2012. My first day of my last period was dec. 9th 2011. I had sex with my ex on dec 14th 2011 which was my last day of my period. I had sex with my boyfriend on dec 16th and dec 19th, i was at high fertility frm dec 18-22 2011.i ovulated on dec 23rd 2011, my doctor told me i concieved around the 23rd,i need too know who fathered my child is it my ex or my boyfriend? Please help im dying for it thanks.