I ovulate later in my 28 day cycle (more around day 16/17) so when I had an ultrasound last Friday I was 6 weeks based off of LMP but I was guessing not quite that far along. However they measured my gestational sac at 6 weeks 4 days. Has this happened to anyone else? I feel like I know in my gut I'm not really that far along. Is that maybe why thy didn't see as much as they were expecting at my ultrasound? (There was a gestational sac, yolk sac, but no fetal pole yet)