Hi, your symptoms of pain can be due to Diverticulosis, as the name implies there are small diverticula or pouches which project through the defects in the lining of the intestines. These diverticula can get inflamed resulting in a condition called diverticulitis, where there are symptoms of abdominal pain, nausea, vomiting and changes in bowel habits. Another entity is Chronic mesenteric ischemia, also called intestinal angina, results from the gradual buildup of fatty deposits along the wall of an artery (atherosclerosis). This can cause severe abdominal pain. Chronic mesenteric ischemia can progress to acute mesenteric ischemia, especially if a blood clot develops within a diseased artery. Am just cautioning you, if your symptoms persist please discuss this with your doctor am sure he will provide further assistance. Regards.