Hi, I'm wondering if anyone can help me. I had early scan today according to my dates I should be 8 wks 2 days but when I was being scanned they said to me could I have my dates mixed up as she could only see a gestational sac which in her words looked 'healthy' but measured at 4 weeks, she didn't seem concerned just asked me to go back in 2 weeks time for a rescan, could I have ovulated later? I'm completely baffled by this and kind of regretting having an early scan, anyone had similar story?