I believe your doctors main concern is how your weight can affect your baby. Just like @lilkountryma said. I don't believe they are trying to offend you, they are just trying to make sure that you and baby are okay. Gestational diabetes is probably the main concern for the dr.

yea but I loose weight when I'm pregnant and that's never a big issue to them, my last doctors appointment, I lost 8 pounds in two without morning sickness and my first pregnancy I weighed the same amount when I had my son when I first got pregnant @lilkountryma

I doubt he's doing it because you're "a bigger girl" You're weight and your health affects your child's health. so your diet when pregnant is very important no you shouldn't be on "a diet' but you should watch what and how much you eat, specially if you already have a weight issue.

my doctor hasn't said anything to me with me being a bigger size than most

hmmmm I dont think everyone should be the same size and if your a "bigger girl" God made you that way. you shouldn't start dieting when you get pregnant. I disagree with your doctor totally...eat girl!

My doctor told me that if I had a craving to ignore it because I'll experience a lot of them and I told him straight up, I might be a bigger female but if I want a damn donut while pregnant I'm going to have one. I have ate every craving I have had except 1 (I'm not allowed to get that till I have her as a reward... chocolate covered strawberries lol) but I have only gained 14 pounds and I'm 34 weeks as of midnight. Don't let them make you feel bad honey, you'll know when too much is enough.