Big baby at 36 weeks?

Sarah-Louise • I live in Oxfordshire with my husband Rich, son Bertie and Molly the cat.
I went for my final growth scan yesterday- turns out baby is growing fine besides his tummy that is apparently off the scale..  He is weighing in at 8 pounds at 36 weeks already! So they may induce me soon. 
I was tested for Gestational Diabetes but it came back negative and I've been eating healthily.. my husband is quite a monster though.. very tall and broad.. and was a big baby when born. 
I read that later scans may not be that reliable.. thoughts anyone to calm my nerves?!