Hi, Welcome to HealthcareMagic Forum. I understand that this is a cause of worry for you. Firstly you need to get a stool test done to check for infection and reducing sugars. Collect a sample of fresh stool in a sterile bottle and give it for testing in a standard lab within half hour. Do not collect stool from the diapers. You must get the test results reviewed from a pediatrician.He/She may guide you if there is requirement of antibiotics. You must also wash your hand thoroughly after changing diapers and also while preparing the milk. Take care