I agree with Sloane - maybe see if you can get a referral to an Endocrinolgist or at the very least an Obsterician who specialises in GD. My OB referred me straight to an Endo and i tried diet controlled GD which only lasted 2 weeks before my levels were sky rocketing no matter what i ate - so at 32 weeks i was put on insulin injections three times a day. one before breakfast, one before lunch and one before dinner all with varying doses of insulin.