I am having symptoms like passing gas and sometimes diarrhoea for about 2 months,My first doctor told me its Ibs and given some prescriptions but it not worked for me. So I went to a gastroenterologist and he suggested me to go through CT abdomen and blood chemistry tests and in those tests nothing found to be abnormal but my condition is not cured, can anyone suggest me is it really Ibs or any other disease and how to get rid of these...