Who is the father? so i know i had my period the last days of july, and had intercorse with my ex boyfriend right after my period, but he never came inside of me. 1 week later i had sex with my boyfriend and also the next week and he did discharge inside,

Unfortunately, : Unfortunately, all of our methods of due date estimations with last menstrual periods and ultrasounds can have a margin of error of a week or two just because there are inherent differences among different people. Your timing makes it very difficult to know without a doubt who the father is by date estimations. You may need to wait until the baby is born and pursue paternity testing at that time. Good luck!