I need someone to help me explain the weeks to my husband, we already have three kids together but he's never been out of town before we found out I was pregnant. According to my LMP I'm 6w3day I went for my ultrasound and was measuring 5w 2days, so in his mine he was gone. He left on Oct 2nd came back on the 29th my lmp was the 16th so I think I had to conceived on the 29th. But he's not understanding, he does not think I cheated he just does not get it. Someone help me help this fool understand lol