Was at the pharmacy getting medication for PPD and the lady working there commented on it

I was babywearing and she said "how can you be depressed when you have such a cute baby!" and I was just gobsmacked.

I considered saying something but wasn't sure I'd manage without starting to cry so I just stood there lol. After I'd paid she also proceeded to walk around the counter to rub her face on my baby's arm (something about not having clean hands, as if faces are much better). And yes, I should have said something or stopped her or whatever, but I just froze