I’m 30 weeks and I’m still feeling quite small. I know I will get larger in my third trimester but how much growth can I expect?

How much did you mamas grow between 30 to 40 weeks? I’m so curious as to how much my body can really expand in the next several weeks? Is it going to be exponential??

Also if I don’t get much bigger does that mean the baby will run out of room sooner and need to come out sooner?