is this first baby? I have measured big for all my bubs and #4 is currently 14 weeks and measuring nearly 16 weeks on a clinic uss! My smallest baby was 8 lb 7 and biggest 9 lb 7... so not small.. my obs is not concerned not altered my dates just dsiad oh well another big bub.. and moved on. they will want to know if you are diabetic.. if not they will usually not deliver early. so no don't worry!
Don't worry. I had the same thing. Dd was 8lb9oz and thy thought she measured normal. The scan has shown this one isnt abnormally large but they reckon 9lb at least, and also seems to have a big head (like his dad ). They generally just want to rule out things like too much water, etc. And if baby is big but GTT comes back low risk they never quite believe you!