17lbs at 20 weeks pregnant?

That's crazy your doctor's lecturing you for your weight gain. 17 pounds at 20 weeks isn't bad at all! I've put on weight really fast with this baby but my doctor told me that as long as my blood pressure and all of that stays within normal range, they have no problem with how much weight you gain. Sounds like you just have a know-it-all doctor that wants to give you a hard time. I wouldn't change anything about your diet and exercise. I would tell your doctor to just get over it.