Hi.
Thanks for your query.
Noted the history and understood your concerns.
Irritable bowel syndrome is necessarily a diagnosis by exclusion and since you are suffering for so many years the loose stools after food and 4-5 times a day I would advise you the following:
Tests of blood, stool and urine.
CT scan of the abdomen.
Colonoscopy.
If anything is found during investigations you need a specific treatment as for example
tuberculosis of abdomen.
If all the tests are negative and normal, then this may be irritable bowel syndrome.
This means there are other factors that are more powerful.
You have to find the factors like stress,
anxiety, psychological problems, foods and beverages that instigate the problem or enhance the situation and have to find a proper solution.
You have to find the management of stress and anxiety which is the most important cause of IBS.
Stop the foods and beverages that increase your problems as there can be an associated intolerance.