I too would be making a complaint about the way he spoke to you.

I'm not saying that being overweight when pregnant won't increase the risk of certain issues, because it can, but it's not a guarantee that it will, and he had no right to make you feel like it would be.

I was one of those who was overweight (BMI around 37) when I fell pregnant and I had a textbook pregnancy - no GD, no pre-eclampsia nothing. My Dr even said he would love if all his pg patients were as fit and healthy as I was. My sister, who is really skinny, got GD and all other sorts of complications.

So not only was he wrong, he was rude, and you don't have to put up with that.