Hi welcome to the health care magic You are having problem since seven year and anxiety history present So here mostly it seems to be functional bowel problem But before that any organic or specific infective cause has to be ruled out by colonoscopy or USG like investigation... According to cause further specific treatment given Try to avoid stress.... If specific infective cause present treated accordingly with antibiotic If alternate diarrhea and constipation present than irritable bowel syndrome might be under suspicion and for that lubiprostone like specific medication prescribed Take fiber diet more and psyllium with milk can be prescribed here Take care Consult physician for examination