I know I'm now panicking over something else but your experiences would be really reassuring!
We had the 20 week scan yesterday which was just incredible and everything seems healthy. Most of the measurements are around 25-70 centile but the tummy is measuring at 90!
I've read this can be due to baby swallowing fluid or the position. However, I'm waiting of a glucose tolerance test due to my mum having Type 1 diabetes and I'm concerned that a big tummy is a sign of gestational diabetes.
Do you think the measurements may even out or am I set to give birth to a big baby?! 
Any thoughts would be really welcome,
Thank you! 