I went to the doctors yesterday thinking I was six weeks. From the date of my LMP it would have placed me at exactly 6 weeks yesterday. I talked with my doctor and she agreed took my blood and then sent me in for a scan. I went in with the ultrasound tech and after the scan she said I measured at about five weeks and all there was was a gestational sack, empty . She said this earlier it's hard to detect anything and not to worry considering I've had no bleeding or miscarriage symptoms. I have another appt in two weeks for another scan. Also it was my first month off of birth control so I'm thinking the date mix- up for my due date could be due to late ovulation.. Anyone else have anything like this happen?