i am 48 yr old female experiencing abdominal pain, cramping, alternating mostly constipation with bouts of somewhat loose stools. this has been going on for two weeks now and i'm getting concerned. i have had bilateral flank discomfort off and on with crampy abdominal pain, nausea, gas. seems to get worse after eating with bad upper abdominal cramps, feel like i may have to move bowel, but nothing. i was taking motrin 800 mg approx. for 1 week before this started. haven't noticed blood in stool. had a colonoscopy two years ago which showed just a few diverticuli. have been under stress also. just a sick feeling, no weight loss or loss of appetite or fever. also had an upper gi series within the past year which was also negative. should i be concerned, getting very anxious.