Thanks hun so much.. I was so confused..
I have had the same problem too. My estimations were for Oct. 28, 2010 for my son but the ultrasound said Dec 8, 2010. The ultrasound goes by the development, length and weight of the baby. The ultrasound was right on the dot with my son's estimated due date too. I would rely on the ultrasound. I hope that this will help you and good luck.