Gender determination

Lindsey
Stories/ experiences please. We have to wait until dec 23 for gender and we are way too impatient. I did not do the genetic testing so we haven't seen our baby since 6 weeks. We are going to a place that does ultrasound for out of pocket. I will be 17 weeks when I go. Anyone have accurate gender determinations by then or incorrect and found out later it was the other sex? Thanks!