Hi. Thanks for your query. Noted the history about having diarrhea after eating anything, stomach pains, have gastritis and acid reflux, wants to know whether this is normal that everything that you eat makes you sick - the Doctor said about stress inducing the present problems.. Since there is pain and diarrhea after eating anything indicates that an organic cause should be found for. I would advise you the following in such a situation. Tests of stool, blood and urine. X-ray of the abdomen and ultrasound of the abdomen. CT scan and Colonoscopy. If all these investigations are necessarily normal, then only this can be said to be due to IBS. If a specific cause is found, further investigations and proper treatment of the cause will help you to get a permanent relief. A course of an antibiotic, metronidazole may be required.