I ate an entire pizza for lunch and I'm hungry again.

Mkmt
I'm 9 weeks exactly today with identical twins and so far I've been super lucky -- a touch of morning sickness here and there and I've thrown up maybe twice. 
But I am hungry ALL THE TIME. I ate a veggie thin crust pizza today at lunch medium size. The entire thing. And 3 hours later I am hungry AGAIN. 
I've gained about 4 lbs so far. I try to eat lots of lean protein and fruit and veggies. I was a vegetarian before I got pregnant but incorporated chicken back in because I need the protein. Now all I want is carb carb carbs and Mexican food and Indian food. Anything spicy!