Girls, could you please tell me if it's normal for the ultrasound at t…

Girls, could you please tell me if it's normal for the ultrasound at the state hospital to show such discrepancies? I had an ultrasound and they couldn't even see the baby properly, not even the full size of the fetus. What worried me is that the gestational age was 20 weeks and 3 days, but she put it down as 18 weeks and 6 days. Is this normal?