Hi Sassy.
I am a size 16 and sometimes 18, i had quite a pudgy belly b4 getting pg and i used to suck my belly in when out and about lol. So i started to get bloated early like 8wks and then couldnt suck my belly in anymore so it felt worse. I was heaps sick aswell so this made me feel worse looking just fat. And people commented on my weight to my sis in law and she told me. I FELT just crappy.
Anyway my belly became more defined around 12wks and just ballooned lol i take after my mum who showed early to. But i have looked pg since about 14 or 15 wks i reckon and had to start wearing mat tops etc. Being big already my expanding uterus just pushed it all out further when it came out of my pelvic area.
I posted pics of my belly at 19wks in my gallery. And now it looks like all baby my belly is firm and rounded But yeah i think we just dont notice the very beginning of our bumps like we would if we were skinny.