How big is your belly?

Mandy • married 25 year old. been ttc for 1.5 years with no luck. irregular periods (three since stopping bc). just wanting some support.had a d&c July 6th and just found out I`m expecting for the second time
I'm now 25 weeks and everyone keeps telling me my belly is tiny.. And that I should be alot bigger.... Anyone else have a belly like mine? I've gained 17.8 pounds since I was three weeks pregnant so not sure if that's a good number or not....