Nuchal fold thickness.

Sana
Ladies I have my ultrasound at 22 weeks the baby was moving around so much.That day we find out we are having a boy.His weight was little over then 1 pound.But the doctor called me and said that the baby has nuchal fold thickness 3.8mm which is abnormal.So she reffer me to the specialist.Does anyone have that and your baby is fine.I have no issues with other 2 children.This is making me soo worried.