Regardless of the results of your glucose
test, you should continue to keep an eye on your blood
sugars during your pregnancy because you are at higher risk of developing gestational diabetes given your history. You will stil need to gain adequate weight to nourish your baby, but you should aim for about 25-30 pounds during the pregnancy and not too much over that, so that you can limit your chances of having abnormal glucoses during the pregnancy.
Hope this helps. Good luck and take care!