Gestational Age all over the place?!

Ja

When I went in for my confirmation/dating scan, my ob said everything looked good and that I was measuring 4 days ahead of my dd based on lmp. Went in for my 10 week scan and she put me right on track with the original dd which kind of freaked me out, as it felt like moving backwards. Today (I’m supposed to be 12+2) I had my NT scan and the tech said baby is measuring 6 days ahead (so 13+1)?! Has this back and forth happened to anyone else?

Here’s our pic from today, heartbeat 156 and refusing to stay still. Finally looking like a baby and not a gummy bear! ❤️