I failed my one hour glucose test. I don't know what I did wrong. My doctor told me to fast so I did. I had a little bit of water on the way there before the test. I drank the sugar drink (which wasn't really all that bad) and felt fine until the last 10 minutes of the hour when I started feeling like I needed to eat or drink some water to get this upset tummy feeling under control. Then my time was up and they drew my blood. Any tips for the 3 hour test?