Trying to watch my weight but get sick when I'm hungry?

Brittany
So I'm overweight and I'm really trying to manage my weight with this pregnancy. I'm not trying to lose weight but would like to stay in the appropriate weight gain range for my size. The problem is I'm always so sick and tired to actually cook a healthy meal and if I don't eat something every 2-3 hours I feel sooo sick and dizzy. Does anyone have any healthy tips that may help?