Fetal age and gestational age

briana

So I’m supposed to be 7 weeks my baby is measuring at 5 weeks i searched up and it state the fetal age is actually two weeks behind explaining why in my ultrasound it was small and I didn’t get a heartbeat when I went in today and I go back in ten days . Anybody heard of this ? Cause I was freaking out cause I thought I was supposed to have a heartbeat today and it wasn’t one but the sac and yolk was present