A little frustrated!

I got to vent..... since the surgery (sleeve, June 21st 2017) I have conquered walking, nausea, pain, gross food options and now I'm frustrated. I am supposed to sip 4ozs every hour to stay hydrated and still eat 3 meals, and 3 snacks on an estimated 4oz stomach. I am never hungry and have no idea what it feels like to be full. Of course I don't want to stretch it. It's got a way to heal. I have pain that feels like gas pain but after 5 days you would think all of the gas they pumped in for surgery would be gone. Am I mistaking the pain for gas when it's really hunger or fullness?? I know I will get through this too, but it's frustrating.