Hugs, MommaBrennan. There are an awful lot of stupid people out there. Thank God our problem is just overweight. We can lose weight, they'll always be stupid.
I had something similar happen to me when I was younger and at my maximum ever weight of 215. I wore loose dresses to cover up, and a teenage girl ran up to me very excited in a store one day wanting to know when my baby was due, chattering away about how wondeful it was and how much she loved babies. Poor kid was so mortified when I told her I wasn't pregnant.
Anyway, stay strong Momma, you can do this!