3 hour glucose test experience

Did anyone else have a rough time with it? I failed the 1 hour pretty badly - I got a 182 mg/dl score. I think it might have been due to not fasting but I could very well have GD. I did the 3 hour today and that first hour was rough! Nausea, dizziness, almost vomiting. It’s been hours since I finished it and I still have a raging headache. Anyone else have to take this test? Did you have GD or did you pass it?