Honestly, if you are worried about GD the less the better (sugar). If you do, and I hope you don't get it, fruit will be off limits as well as juice. When I was pregnant and had it I didn't eat any fruit, only veggies because it spiked my sugar right away. I know I was all or nothing, but I stayed away from anything that spiked my sugars. When I had foods, I wouldn't have anything that had over 10grams of sugar ever. I was really strict with what I ate because I didn't want a big baby. I had to use insulin as you know and they were amazed that I went full term with only a 7 lb baby. They were predicting a nine or 10 lb baby, but he was 7 lbs on the nose. I wouldn't go too crazy worrying, because I think you will be fine if you exercise and eat sensibly. Honestly, in the beginnning of my pregnancy I ate terrible, I craved sugary drinks and candy and I ate a lot of it. I am not surprised that I got it. My dad had diabetes as well, and I was 15 lbs heavier, so even more obese than I am now. A lot of people can control it with diet and exercise and because you are on a good path already, I am sure you will be fine.