Is this what full feels like?

I am just 4 days post-op and am on liquids for another 10 days (cream soups, yogurt, cream of wheat)

Today is my first full day out of the hospital and I have to say I feel pretty good. When I sit/lie down, I don't feel any pain. Just some discomfort when I stand up but been trying to walk as much as I can.

Ok so my question... I had just a few bites of cream of wheat this morning and felt a tight feeling in my lungs... Is this me being full? I stopped eating as soon as I felt that cause I don't want to be sick.

Am I assessing my fullness correctly?

It feels "full"...tight, under your lungs/ribs. I didn't feel it much while I was on liquids, but now that I'm eating food, there is no mistaking it.