Down syndrome scare

Has anyone else had a ultrasound technician tell you that your baby had markers for Down syndrome.. Well about a week ago I went in for an ultrasound and my baby was moving around a lot and hiding her face and they couldn't see her nose bone or that it was very small... So they said that it was 1 in 25 chance for Down syndrome.. So I took the genetic testing which I wouldn't have don't unless they said that I'm not one to want to know because no matter what it says I was having my child but I felt my mind wouldn't rest and she was implying all the good parents would take the test well it came back she has 23 perfect genes or what ever but I just was wondering has this happened to many.. I read some where that it's hard to tell see the nose bone in blacks ( which I am)...