Ob-Gyn questions? Ask a gynecologist online.
Your symptoms are suggestive of an intestinal infection. Your butt hurts because of repeated wiping - the wiping has probably caused minor lacerations over the soft mucus membrane of the anus.
Please take Immodium or kaopectate tablets, available without a prescription to help decrease the number of times you pass stool. Also apply cortizone ointment twice daily and neosporin ointment daily on the anus - this will help the lacerations to heal up faster. Both the ointments are available without a prescription.