I had mine at 8am today.
I'm only 16 weeks though, having it early on account of PCOS-related diabetes risk (and will have it again later on in the pregnancy).
I was told to fast from 9pm last night for my 2 hour test and was told no water throughout the test (and certainly nothing else to eat or drink during the test).
I've had it before and found it quite fine to be done with in the morning, especially with the fasting.
Today it was a complete disaster as I'm still suffering quite badly from morning sickness and couldn't complete the test. I managed to vomit all over myself from the glucose drink an hour into it and have to come back another day to get it done. I think this is particular to me though as I'm still vomiting daily and can't go without eating something for long periods!! Was so upsetting
In your case though I would be getting it done first thing in the morning and fasting from the night before, but I suppose that is because I haven't heard of getting the 2 hour one done without fasting. (I understood that affected your blood sugar and skewed the result)
ETA: Sorry, for the benefit of anyone who reads this later, my comment relates to the Glucose Tolerance Test. OP has subsequently edited the original post.
Edited by whisk_, 03 December 2012 - 11:00 AM.