You could be suffering from amoebiasis. Do you have a sensation of urgency when you have the urge to pass stool? Do you have a tendency to go stool after a meal? Even after passing stool do you feel it is incomplete? Any mucus in the stool? Any flatulence or gas downwards? Does the pain you are talking about around the area of the umbilicus get better on passing stool?
Do all these symptoms get worse on intake of any particular food?
How is your appetite, thirst, urination, bowel movement, perspiration, sleep etc.?
Have you undergone investigations including a stool examination and a stool culture too?
The above details will help in narrowing down on a homeopathic medicine which has the capacity to cure such ailments easily. Common medicines like nux vom, merc, merc cor, sulph, aloes, colocynth are good to treat such disturbances.
I am sure homeopathic medicine would be of help to you.
Dr.Venugopal gouri.