You're so big!? Hurts my feelings!

I am getting tired of people saying that my belly is so big for being 5 months!  Especially one of my coworkers, her comments are mean. I just wish people realize words can hurt. If you aren't going to say something nice to me, I rather you keep it to yourself.
Do I really look that fat?! I have gained 10 pounds since I'm pregnant, and I'm 5 months.
Advice is welcome, thank you!