I am pre-op and I get physically ill and extremely grumpy when I'm hungry. My question is this.... Will I still get light-headed and queasy from a lack of food?

Things will get so much better for you! I was the same way and haven't had one issue since surgery and I'm 2 months out. I've been like that my whole life and then was diagnosed with type 2 diabetes six months prior to having surgery. I can assure you life only gets better from here on out! good luck with your surgery

P.S. You will be EXHAUSTED the first couple of weeks after surgery but it's nothing like you feel now. And after you make it through the first couple of weeks you'll be golden!

I get very nauseous. 8.5 mths post op.

I get nauseous when I need to eat. The good thing is I still fill up pretty fast. Keeping protein bars or even a RTD protein drink in my bag addresses that issue pretty quickly.