Yep, I did. With my son from as early as 9 wks he measured big, and got even bigger at the end. At one point they were going to move my due date but didnt. He never ever measured less than 2wks larger than the dates and I'am very sure on my dates, my AF is like clock work.
He was born at 39wks1day and weighed 7lbs. 13ozs. and I remember at my 36 week or so ultrasound them estimating he would be about 9lbs, but there is no way he would have gained that much by my due date, so they can be off. Doesnt mean you are going to have some news making huge baby,lol I wouldnt worry.