I had a scan at 4 weeks 6 days and she measured me at 5 weeks 1 day based on scan and only saw a gestational sac. There have been a lot of other people who only saw a gestational sac at 5 weeks 1 day and went on to have miscarriages. I'm scared out of my mind and don't know what to do. Did anyone have just a gestational sac and then went on to have a healthy pregnancy?