Hi welcome to the health care magic You can have here acute gastroenteritis or colitis as per history History should be taken regarding fever, drug history, outside food, vomiting etc... If fever associated along with these presentation than dysentery also can be possibility You can be prescribed broad spectrum antibiotic like ofloxacin and ornidazole.. For week.. Use more water for drinking Fruits juice taken more Tablet vizylac like probiotic tablet and pantoprazole also should be prescribed If improvement not occur than stool culture, USG, colonoscopy like investigation done as per need Take care Consult physician or gastroenterologist for examination