I don’t feel like my belly is growing..

I’m 19 weeks and I just don’t feel like my belly is growing. This is my first pregnancy and I’m not that petite, 163cm and 56kg.

I haven’t had an ultrasound in over 2 months however I do feel light flutters here and there as well as sights of colostrum.

When I eat, I’m super superrr bloated. If I stick my tummy out, I look 6 months pregnant. But my belly isn’t firming up, it just looks like a gut.

Has anybody else experienced the same thing and it was just them overthinking?