Abdominal Fullness, Cramps, Bloated

I can't eat very much before I feel full. Sometimes after eating I get abdominal cramps, have diarhea and have to go to the bathroom right away. Most of the time I feel a fullness in my stomach and feel bloated alot. I get a wave of heartburn it seems from nowhere. After my bowels move the cramps in my stomach are gone, but still feel a fullness. Does this sound like anyone's problem. Please reply and let me know.