Had a ultrasound for growth scan, heartbeat is good beating at 139, she of course sucked her thumb and hid her face…

Had a ultrasound for growth scan, heartbeat is good beating at 139, she of course sucked her thumb and hid her face which I thought was adorable. However, she’s in the 3rd percentile and has poor fetal growth which is affecting me and possibility of antepartum so I’m thinking it could be IUGR so she’s not growing to where she’s supposed to be so I’m now considered high risk and being referred to a perinatologist (maternal-fetal medicine specialist) with special training in high risk care. Which will be on Tuesday the 30th. My OB did mention there’s a possibility of delivering her early. Should I pack? Pack for my daughter? Any one have similar experiences? Help!