Kristen,
I'm PS and had very mild/borderline GD. Of course I'm 37 years old so that put me at risk even without mild CF. The GTT is done later in pregnancy when your hormone levels are higher and it's routine. For me maintaining/gaining weight on the GD diet was a bit difficult so we modified the diet to allow me a little more carbs and I used to eat when I woke up in the middle of the night. My sugars were almost entirely under control. The biggest issue was my sugars dropping when I woke up in the morning so I had to eat immediately. I delivered a full term 8.5 pound girl.
Bonnie