I can't tell for sure, but either way my pants are getting snug and my belly is puffy.

I'm not sure. Probably a combination of both! I know with my second I was showing for sure by 10 weeks. It shocked everyone (myself included!). However the third was a "hider" and I was able to keep my pregnancy a secret until I was almost 23 weeks. So it's very possible you're starting to show a bit as every pregnancy can be so different!

i agree it can be combination of both i carried both of my girls so diffrently.

6 weeks seems early, but I've heard that you can start showing early with every pregnancy after the first.

Hmm, very well could be showing even though it is certainly early. I showed pretty early with my second though not so much with my first or third, so all seems to be on the whims of the wee babe.

you can see my lower belly is a little enlarged, they said my uterus was already enlarged and i can tell when i look that it's bigger but i've actually lost about 8 lbs. in the past 3 weeks i dunno where i'm losing it though lol

I felt that I was too but I think it was mostly bloating. Its fun though because your belly will start getting bigger week by week!