I Am Constantly Bloated. The Second I Eat Anything I

I am constantly bloated. the second I eat anything I get bloated and my stomach does not decrease in size. I do not have gas. I have eliminated and tried different types of foods, it does not matter what it is..even if I do not eat all day, and just have a beverage, my stomach gets bloated looks like im 4 months pregnant this is getting serious.