Insensitive comments

Why do people think it’s okay to comment on a pregnant woman’s body and how it’s changing? I had a client tell me my face has “filled out” and another who told me “you’re going to be huge by your third trimester!” ?! As someone who’s struggled with body dysmorphia, body image, and eating disorder tendencies it’s so incredibly triggering. And I can’t crash diet or skip meals like I used to in order to feel better because I love and care about my baby too much. It really is so hurtful and I just can’t understand it. How do other people handle the awful and unwelcome comments?