Measuring big at 36w5d

When we found out we were pregnant I was given an EDD of 10/7/16 after the growth ultrasound the said 10/2/16 . Each ultrasound she's measured as if my due date was 10/2/16. I had a growth scan today at 36w5d (10/2 DD) and she's a whopping 7lbs measuring as if my DD is 9/25. I haven't had extreme weight gain I've gained about 27lbs at this point which is normal. No high blood pressure or gestational diabetes. My first was born full term 7 lbs 12oz. Any one else out there with a big baby?