Hi. Thanks for your query. Noted the history flu and other bugs too often recently, body ache, unsettled stomach, ruined appetite, taking probiotics, but find that you need to more often other the stomach feels unsettled in the lower area if you do not eat every 3 to 3 and half hours. This is indicative of an intestinal problem and may be diabetes or so. I would advise you the following: Stool tests for three consecutive days Tests of blood particularly for Sugar, HbA1c, thyroid function tests and as needed as per the clinical evaluation and examination. CT scan and colonoscopy helps further. All these tests will help to find the probable cause and plan a proper management. If all the tests are normal, this can be taken as IBS and treated accordingly.