Is she ahead of schedule?? EDD-10/18

Tiara
Last ultrasound on Tuesday baby was measuring at 3oz & 9cm long from head to butt. The tech said it definitely looks like Nyla is kinda big for only 14 weeks, but not to quote her on it. Of course this was at a private scan and not my OBGYN, should I be expecting an earlier due date?? Or is this an average size?? My next doctor appointment is on Monday.