measuring ahead?

Caleisha
Okay, so I went to the doctor today and she said my son is measuring two weeks ahead. I'm not sure how he's that far ahead, since he measured spot on at our last appointment two weeks ago. I'm currently 33weeks, baby is measuring 35. Scheduled an ultrasound to check things out, but being a FTM after two losses, I'm concerned. Anyone else had this happen? Advice?