Coworkers getting on my case about eating

So I eat every 2 hours during the day. Small amounts. Nothing over the top.

I actually have just started to track my calories, carbs, and fat in the my fitness pal tracker.

My coworkers are really nosy. I work a desk job, in a similar situation as a call center, only we type all day. Two coworkers are all “ya girl, you feed that baby!” And it’s cute. The other lady is always on my case about “there you go eating again!” I’m like, hello, I’ve told people I’m pregnant. I’m not binge eating candy or breads. Get off my case! I’m hungry.

Why do people think it’s acceptable to be negative about eating. I’m already 20 lbs over weight and conscious about not gaining some exorbitant amount of weight.

Thoughts? Thanks!!