I had mine done twice only due to me having big babies I had a vaginal birth and my daughter weighed 9.2 the reason they took it twice was just to make sure I didnt have gd they took one early in my pregnancy and another later in my pregnancy but there could be any reason for them to be doing it to u again...
I passed the first time but I threw it up in the middle and had to start over but I've heard a lot of people say they failed the first one and then passed the second time
I've heard it's normal to fail the first and pass the second one. I have mine on Monday! Good luck!