I've been to the regular doctor and Emergency room and they said I have gastritis. But no tests have been done yet. I usually feel pretty good but lately when I eat a little bit bigger meals like a salad and rolls or a peanut butter and jelly sandwich, I feel fine at the time... but a couple hours later I feel so full and like a brick or food is just sitting in my stomach. And also a little burning in the middle of my stomach area. Sometimes it feels so heavy I feel a little nauseous. Any idea what this could be at all?