Angel I found out just last week. I am 17 weeks 4 days. My Ob wanted to test me early cause a fasting test my doc gave me was 5.5 which he believed was borderline even though my doc wasn't concerned. So they sent me off early for the GTT. So I have a while to go I am due in October. The appointment was easy, they make you ***** yourself in the session! I had lunch 2 hours prior and mine was 4.4 so she was pleased with that. Then they go over what you can and can't it. It took about 2 hours all up.