Hello, ladies! I have a question for you. Today I had an ultrasound an…

Hello, ladies! I have a question for you. Today I had an ultrasound and they told me the gestational age doesn't match even with the doctor's measurements. That is, the ultrasound shows a week longer than the doctor's measurement. And the ultrasound shows a three-week difference from my own calculations! But everything is fine on the ultrasound, all in normal range! Could it be that someone else has experienced this? The difference in dates really scares me.