Big Baby

I had my regular prenatal appointment this morning.
We're 30 weeks but measuring 34 weeks. The doctor was a little surprised.
They want us to go for an ultrasound late next week. They said 99% of the time baby is just bigger than average - but it could be something else like a fluid problem and they want to make sure.
So it's more likely that baby is either really fat or really long.
My vagina and I are voting for really long.

Also it looks/feels to them like baby is sitting breech (bum down) - but they're going to give baby until 36 weeks to make up his mind. My mum tells me that I didn't budge until nearly 38 weeks. Like mother, like child?