Yeah, I would have pain/a dull fullness feeling under the left rib/and around my abdominal area after eating any meal and occasionally when I would wake up the next morning. When I was younger, I was a very slow eater as well as drinker. That is why I was questioning the whole esophagus/indigestion deal--because of the above. I had the endoscopy first--just as a process of elimination--found out I had minor gerd was given prevacid--then started having pain in the chest cavity (left side) along with the pain under the left rib (same time) so I thought there was an association between the two. Usually the back pain would radiate to my sides as well---and that would occur usually after eating as well. When my doctor first diagnosed me as ibs--i always associated it with bowel movements "hence the "b" in ibs--but it really deals with the entire digestive system (and the processes)--such as eating/stress and so forth. Been looking up now alternatives to dealing with it (since it is life-long/non cancerous--and probably chronic)--because it does deal with sensitivity to food and how you feel afterward. I am also looking up "neural therapy", probiotic regimen, and a. Nutritional plan (eliminating foods that don't work vs foods that does/through journal)