Hi.... Bloting and constipation problem may be because of indigestion of foods. You have previous history of diahorrea so it may be because of Infection of intestine by bacteria or viral. Stool examination test is helpful for diagnosis. Stressful condition may worsen the constipation problem. In irritable bowel syndrom on and off constipation is seen. Lactose intolerant may cause bloted abdomine after taking dairy items. Too fast eating may cause indigestion. Abdominals ultrasonography is helpful for diagnosis. Colonoscopy is helpful for further diagnosis. I hope my guidance is helpful to you. Take care. Thank you very much.