Venting about my night

I’m kinda upset with my partner right now. We went out to the movies and when we got there both went to the bathroom. Well we walked to the line to grab something to drink along with a snack? Well my partner done said “your belly is sticking out” I was so pissed. He ordered me a drink, no snack bc I already feel self conscious about my body. I have a 5 month old and it’s taking me a while to get my body back, if I ever do. I mean I’m not really sure exactly how my belly was sticking out though. I was wearing my shirt and it was pulled down, my pants were up. Like I don’t get it, I told him that was very rude to say. Am I wrong for being upset with him? I don’t think I am.