Hi.
Thanks for your query.
Noted the history and understood your concerns.
Need to go for passing motion that is painful particularly after eating, loosing weight, reduced sleep and tired all the time could be due to the following reasons:
Intestinal infection particularly at the ileocecal region.
Colitis.
IBS that is
irritable bowel syndrome.
I would advise you the following in such a situation:
Get a clinical evaluation by a
General Surgeon or a Gastroenterologist.
Tests of stool on three consecutive days.
Tests of blood particularly for thyroid, liver and pancreatic functions; to see for
diabetes Ultrasound of abdomen.
CT scan and
colonoscopy to make the final diagnosis.
If we get the positive findings in any of these reports, get a specific treatment and if all the reports are withing normal limits then this has to be taken as IBS.
Identify the foods and beverages that instigate or enhance the problems ans stop them altogether.
Control of stress and anxiety is very important part of management.
Take care.