When I became pregnant I was plus size, although I don't remember any of those comments. (Maybe I ignored them.) I also didn't gain that much, partly because I was sick the whole pregnancy.
I'm sorry your feeling so down about yourself, I think no matter what we weigh we will always be critical of how we look. We have good days and bad days. I can't believe people are so insensitive... although I shouldn't be surprised, I've been asked if I was pregnant when I wasn't and that was just horrible!
I recently lost 33 lbs, and I didn't exercise much at all. I've been doing Weight Watchers online (i'm not even going to meetings.) The thing I love about weight watchers is there is no special food. I can eat whatever I want as long as I stay within the plan. It forces you to change how you eat and make good food choices, so it's not a diet. Anyway I thought you may want to check it out. (After the baby comes of course!!)
I'm sure once you have the baby, you will feel much better. Just hang in there until your beautiful bundle of joy decides to make his/her appearance!