I failed my one hour test, and then took the 3 hour test and failed that one too, but just barely. I had to test my blood sugars 4 times a day for the last several weeks of my pregnancy. That was fun!
Let me tell you though, what a huge motivator that was. I didn't gain any weight during the last 10-12 weeks of my pregnancy. I had a little extra fluff starting out so it was okay. The GD went away right after my baby was born, thankfully.
Good luck with yours!