Definitely find out about the three hour test. I controlled my gestational diabetes with diet, and Clara was not born too big (apparently babies born to mothers with gestational diabetes can be on the large side) and she never showed any signs of jaundice (another result of babies born to mothers with gestational diabetes). I wasn't testing my levels at home prior to getting the one and three hour tests, so I can't really help you out there. Good luck, though, with whatever happens! It's going by so quickly! Your baby will be here before you know it!