Thank for asking to HCM
I really appreciate your concern this could be intestinal infection at least what the given history suggested, if I would be your doctor then I would treat you with the following medicine,
1) Tab Metronidazole
40 mg twice in day for five days
2) Tab Domeperidone 30 mg once in day
3) Tab Omeprazole
40 mg once in day
hope this information helps you have nice day.