If it gives you a little comfort, I had my baby at 28 weeks and she weighted only 1lb 9oz. We did have to spend a long time in NICU, but she just turned 1 this month and is during really well. She is still on the smaller side but doctors are not concerned. The main thing is she doesn't have any major health issues.
Just try to stay calm and make sure the doctors are monitoring you closely. Im sure your baby is going to be fine!! Best thing to can do now is to stay positive and stress free. I know is not easy but try to focus your attention on something else.. Good luck, mama!!
I think the blood flow through cord is more concerned ing than the actual Oz size. They noticed my baby was small at 34 weeks last time, he ended up being born at 37 weeks and was 4.8oz...he was healthy. They did send me in for extra ultrasounds to check cord. It was fine. If yours is an issue, I imagine they will have you come back and do more ultrasounds to monitor the baby and cord. If so, I would take comfort in that...extra monitoring will help you not worry. And if it gets to the point that they see a problem, they'll have a plan. Prayers for you and your little one.
I don't know about blood flow, but I just had my anatomy scan and measured 19weeks and my baby was 9oz and my doctor said it was perfect and measured appropriately. Not sure if that helps you!
I was induced at 38 weeks as the cord blood had started slowing. He was 6.3oz.