How would you deal with annoying comments from a coworker?

I 34F will be a FTM this April and I’m 25w 6d pregnant. I was moved to another department at work that is less stressful to ride out my last 3 months of work. There is this older woman who (has never been pregnant or had any children) that makes comments daily about how I’m getting bigger. At first I would just smile and shrug it off but it’s become very annoying as I’m struggling a little with how my body looks/feels with all these changes. The first thing she says to me at 8:30 this morning was: “Getting bigger! Your face is looking fuller too!”

All I said back was “YUP THANKS!” Turned around and went back to work. It’s just embarrassing and makes me feel self conscious.

How would you deal with this? Am I being sensitive or is this actually really annoying?