Small baby

So I had a growth scan at 33+4 weeks and baby was estimated at 4lbs, they were concerned and sent me to ADAU who have told me I need to have a Doppler scan to check my placenta is doing what it needs to and that I will have a growth scan every two weeks. They’ve said they may have to consider delivering early if she does not get big enough. I’m just wondering if anyone has been through this and how baby was? Her head is fine sized. Big if anything but it’s her tummy that’s small)