Irrated with people saying I'm not big enough ughhh

Really need to vent sorry lol. Tired of people especially the ones I work with always say things like "you don't even look pregnant",    " when are you gonna pop out" , " your not gaining enough" , " are you even pregnant". Mind you I'm only 19 weeks and 4 days.  Yes so far I've only gained 4 or 5 pounds but I'm still eating three meals a day and also working full time. I think I have a while to still gain some weight. I don't know if I'm the only one that gets those comments but it's enough to make someone wanna blow up and yell .