36 weeks and gestational diabetes

Well I'm beyond annoyed. I've not given into cravings and feel as though I eat pretty healthy. I passed my glucose test at 25 weeks. But 2 out of my last 3 prenatal appointments I was spilling sugars. So I had another 1 hour glucose tests: and didn't pass. I am meeting with a dietitian tomorrow and was told i would need to start monitoring my blood sugars. We've had many ultrasounds due to short cervix and baby has a liver spot. And she has not been big at any ultrasound and I've been on track for my weight gain. I'm just so upset considering I'm almost done and I have no symptoms of GB. What can I expect to be asked about tomorrow with the dietitian? What questions should I ask? I don't mind changing my diet. But the end is so close! 😞