Health Concern?? 16 Week

Heather
Yesterday I had a 30 min. sonogram done. Not by a doctor but a place called Fun Fetal. I'm 16 weeks pregnant,found out I'm having a boy. My baby was constantly opening and closing his mouth like a fish. Moving his hands over his face. I was wondering if this a health concern? The tech said wow that baby is hungry.The baby doesn't feed through his mouth. I happen to run across a comment a lady said its a sign for Down Syndrome.. Please,can anyone tell me if this is normal or not.I have a doctors appt. in a couple days.But hearing that kinda broke my heart.