Welcome to Healing Well! I'm sorry to hear you are suffering with eating/digestion problems. It sounds as if your stomach isn't clearing food as fast as it should. Typically, it should be pretty empty by a couple hours after you eat.
Have you checked into delayed stomach emptying/gastroparesis? Also how about
Celiac Disease. Not to try to frighten you about
either, you might find that one or the other rings a bell. It's probably not either, but I thought I'd mention them, as they did come to mind.
Here are some sites that will give you some background...
Now, don't go jumping to conclusions! I hope I haven't confused you more!
Glad you've joined us.