im suppose to be due November 18th putting my conception date the 26th of February and my last period the 12th of February but my original due date was October 28th bc my last period was somewhere around the end of January but I didn't have sex till the 6th of February and then when I got my first ultrasound April 14th my son was measured to be 8 weeks and 6 days putting my due date at November 18th in just confused bc I had sex with the first guy February 6th which would of be accurate with my first due date but then I also has sex with a different guy February 26th witch is accurate with my second due date so I'm confused .