Is there any chance the OB could be wrong?

Hey, well I can just share a personal experience w/ you. Last year when I was pregnant with my first child my doctors also said I was measuring a few weeks behind and my baby was small with hardly any growth also. And of course this is a big deal b/c everyone wants the baby to be healthy & I was really freaking out. They also thought my child might have Spina Bifida or Down Syndrome. So they scheduled me for a Amnio shot which is a shot in the stomach that detects any birth defects & to see how far along you REALLY ARE. It took them a week to call back after getting my results & come to find out my child had neither Birth Defects & yes I was behind and I could just be having a small baby. I know this doesn't answer your question but I know the emotional stress it can put on a woman. My advice to you is to don't give up hope & remember that a doctor is NOT God. I wish you the best of luck =)