Went to doctors

Jessica • Fri, Sep 19 • I am 28, married, we have a 6 yr old boy and currently pregnant with our daughter :)

I went to the doctors yesterday for a normal check up. Doctor measured my stomach and said that I was measuring almost two weeks ahead of scheduled she said if I keep measuring ahead we might move my due date up which could put me into Xmas week. Has this happened to anyone if so what happend?