Thanksgiving with GD

Hello, I am 32 weeks. I passed my glucose test at 28 weeks (124). I went in for a growth ultrasound yesterday because my little one was large at 20 weeks (95th percentile). He came down to 87% overall but his belly is off the charts. They did another 1 hour and it was 177. I go in for the 3 hour on Monday. As I have been given no information so far on how to eat with GD how should I eat until then? Especially since today is Thanksgiving?

Also the doctor I saw for the first time, and not going back to, told me to not gain anymore weight. His calculations show I have gained 33 already, but mine says 24. He is already assuming I'll need an induction at 39 weeks. He made my feel bad about myself and I went home and cried. No previous doctor I have seen had been concerned about anything including my weight or my babies big belly (he also had this at 20 weeks).