I have a concern, I have been reading everywhere online that the NT scan it supposed to be done between 11 and before you hit 14 weeks of the pregnancy. I don't have an appointment with my doctor but until after the 14th week, I didn't get the test done before then, so I called my doctors office to question that and I was told I was going to have it done at 16 weeks. But I keep reading that thats gonna be too late to know. What do you guys think?