hi i had gone through your query and understand your concerns. i would come up with two possibilities
1.the first one is,FLATULENT DYSPEPSIA;
-suppressed emotions are some possible causes
2.second possibility is,DIVERTICULITIS;inflammation of balloon-like protuberance due to excess Gas pressure in intestines.often caused by additives in food,or low blood sugar
x-ray with barium enema
may confirm the diagnosis.
I hope this is helpful for you, thank you