Bump?

Cierra💙

So this is my first baby and I’m currently 20 weeks. I’m honestly barely showing even though pre pregnancy when I’d lay down my stomach sank in and my hipbones stuck out, I was thin as I worked out a whole bunch. But now it’s not like that anymore. I certainly have more then what I used to and my uterus sticks OUT when I lay down. I have like, a roundness to my lower abdomen but idk. What do you guys classify as a bump? Like what make it a bump to y’all and not bloat or something?