I'm having abdominal pain focussed in umbilical region for last 4 days.Appetite poor,no nausea,stool normal , no fever,Pain subsidiing little after antispasmodicc drug.Such condition I had several times before.OBC stool neg. USG abdomen nothing abnormal, Endoscopy st & dued.normal, Colonoscopy nothing abnormal done a year back. What should I DO?