I was thinking the same thing, that I have had a lot of bloating and gas. Yum! TMI lol
But I had a bump quite a bit earlier than you did with my first. Had a pot belly by 10-12 weeks even with my first one. But then again my belly was just HUGE during my pregnancy lol.
At this point it would just be bloat and kinda like muscle memory. Baby is too small to change any physical appearance. But with your second you do start showing sooner! With my first I didn't show until after 6 months and with my 2nd I had a belly by 16 weeks.