Stomach Dysmotility?

Ive posted this before, but i havent found an answer to my problem yet. 2 Years ago my digestion went haywire... seemingly out of nowhere. I feel really bloated for AGES whenever i eat and after about 2 or3 hours i start to feel nauseous but i never vomit and i never have any pain its jsut REALLY uncomfortable. It lasts about 5 hours or as long as it takes for me to get hungry again; After 5 hours or so ill literally go from being bloated and uncomfortable to feeling fine and actually HUNGRY. Ive serious had every test done on my stomach, i had a gastro intestinal endsocopy, a colonscopy, i had a barium meal, ive had my pancreas checked, ive had my gall bladder checked for stones, ive had ultrasounds, CT scans, abdominal scans - the works. Ive taken to researching this myself and is it possible i have stomach dysmotility? The symptoms seem to fit. I thought i was gluten intolerant or lactose, but it happens when i eat ANYTHING. Someone please advise me?