3 hour glucose tolerance

So I have mine tomorrow morning. I think they said nothing to eat or drink for 8 hours? Maybe 10? 
How was it for those of you that have done it? I didn't really change my diet much just didn't eat sweets the last few days and drank more water. I'm so nervous that I'm going to fail. Also nervous that I'm going to puke. And to make it even worse I have to do it at the hospital and not my obgyn's office because my insurance sucks. 🙄😐 
Update: I passed! I'm still feeling kind of cruddy but relieved that I passed! They were out of orange so I had to drink the dreaded lemon lime again. Yuck! 
Fasting 84
1hour 166
2 hour 123
3 hour 93