Am I in the wrong here??

Is it unfair of me to get mad when other women ask me how far along I am, I say 33 weeks and they ALWAYS tell me how tiny I look. I know most people would kill to be told "oh you're still so tiny" but I just feel mad. And I'll tell them "oh no, I've gained 43 pounds already!" And they just tell me how there's no way, I have to be lying, or that I still look so small. Maybe I'm just jealous of the girls with the big ol' bellies. Opinions?