Yes im on baby #5 and im almost 14 weeks but look like 6 months lol depends what I eat too because some times I feel I look thin lol your body definitely remembers and gets right back into position I think lol ;)
Most 3rd time Moms show fast because your body remembers what to do it what other Moms have told me
When I was just 10 wks with my 3rd I was showing. Couldn't even fit in my regular pants.
You're probably bloated which is normal in early pregnancy. I was so bloated I looked 4 months at 8 weeks.