My son is 11 days old and he still has his umbilical cord. I thought it was doing really good but then today it had made a small stain on his clothes that looks like blood. It is detached on one side but still well intact on the other. People say to clean with alcohol but doctor said to just keep clean and wipe off when giving bath. Is this normal? And how soon will the cord fall off? Does the blood mean it is infected?