Down Syndrome?

Hi ladies I had my 3D ultrasound and baby girl stuck her tongue out a few times I googled it thinking nothing of it and it showed that it could be a sign for Down syndrome?!?! It did make me worry, I’ve had the 2 blood tests (first & second trimester) along with the 12 week NT scan and all was normal ... has anyone’s baby stuck their tongues out in ultrasounds? Is it normal?