Small baby....Early delivery?

Claire
Hi all, I'm after some advice, or anyone who has had any experience of this. 
I am 28 + 4 weeks. At 26 weeks my baby boy measured on the 20th centile on his growth chart. Which although is small, it's still in his range. We had to go back at 28 weeks for a growth scan. He is now on the 8th centile in his growth chart. So although he has grown slightly, he has even fallen off his own line. 
I need to go back at 30 weeks to check his growth again and then I have an appointment with the consultant booked. The baby may need to be delivered earlier if he stops growing. I'm not scared of caesarean's, I needed one with my first child as she stopped moving, but she was delivered at 37 + 5 weeks, so still full term. But I'm petrified if this baby has to be delivered before he approaches full term. 
Has anyone had any experience?! Xxx💙👶🏻❣