Belly changing shape?

So, I'm a bigger girl (size 16-18) so I started this pregnancy with a bit of a belly to begin with. I have not gained any weight and of course I'm still not showing (I'm 9w4d), but I looked in the mirror yesterday and noticed my belly is starting to take on a different shape. I wanted to make sure I wasn't just seeing things so I asked my husband if he could tell too and he said defintely. I know my body is moving around a lot to accommodate the baby so it's got to be normal, but has anyone else noticed this?