Hello, I had unprotected sex with this guy March 27,2016 & I got my period March 30, 2016. I had a normal period and then I got back with my boyfriend and him & I had unprotected sex the whole month of April , I missed my April period and I am now 17 weeks pregnant , my due date is January 5th , 2017. I've looked at several conception calculators & they all tell me my possible dates of conception were April April 3-18 and my doctor told me my possible dates of conception were April 5-15 ... My doctor looked at my ultra sound and told me I got pregnant April 2-5 ... I'm really nervous and I'm praying this is my boyfriends child , I have some fertile calendars and according to them I was not fertile on March 27 but I was fertile April 3-14 .. I need help , I'm tired of stressing so what do you think ?