I feel exactly the same way, most of the time. Like something is stuck in my chest. That is, when I don't feel nauseous, hungry or with heartburn. My stomach is this bloated, bruised and bloody mess.
I can't stomach the protein shakes and I'm not getting neatly the protein I'm supposed to. I went home for lunch today and yesterday, because I couldn't eat anything in the cafeteria, and I really, really didn't want to go back to work in the afternoon. But I did, because I had to.
On the plus side, I'm getting enough liquids or close to what I'm supposed to, and I'm tolerating tomato soup and very thin oatmeal reasonably well. So that's something.