At my last 2 appts. I`ve been measuring 4, and now 5 weeks ahead of what I actually am. I am supposed to be 31 weeks tomorrow but meaasuring more like 35.5 weeks. I`m going to have an ultrasound in 2 weeks but I`m getting more and more concerned. Anyone have any experience with this? Due date changed? I know I`m 100% sure on my conception date and no gestational diabetes. This is my 3rd baby. My first 2 were girls and they were small/average. (6 lbs. 12 oz & 7 lbs 9 oz). Thanks for your input!