Hi. Thanks for your query. Noted the history and understood your concerns. Feeling of something still left in rectum on sitting for long or on passing the stool is indicative of a condition called procto-colitis or can be IBS that is irritable bowel syndrome. I would advise you the following in such a situation: First of all get control over the stress and/or anxiety as this is the basic cause in most of the patients. Get an appointment of a Gastroenterologist as you will need a colonoscopy, clinical evaluation and further investigations like that of stool, blood, urine; ultrasonography and CT scan of the abdomen if needed to get a proper diagnosis so that a proper treatment can be instituted. Till then identify the foods and beverages that instigate or enhance your symptoms so that a these can be stopped completely to get an additional benefit. If all the investigations are normal then the treatment is for IBS. All these things together will help you to get a good control of your symptoms and get a better life.