Gestational diabetes.

I had my test Wednesday at 12 weeks 3 days, it was high at 147 but she said I didn't fail. Sounds like a failure to me! But anyway... It was a horrible day, I hadn't eaten since noon the previous day and it was my third blood draw for the day. Needless to say by the end of it I was passed out. So now I have to do the 3 hour test! I'm aggravated. What are the chances I fail? I've never failed with my previous children so I don't know the odds here.