Big babies.

So my second pregnancy resulted in a 9lb baby that they expected to be 7lbs. I don't have diabetes, and now at 29w1d I'm measuring ahead. This is my third baby and not really gone through this in getting a ultrasound at 32 weeks so am I too far to be moved ahead for my due date bc my doctor said with my history of having a large baby and her measuring so big she is nervous that I will have one again. She told me I'm measuring at 30w when I was 28, so about 31 weeks is what she expects right now then.