Kindly take the babies for check up with a paediatrician letting the doctor know you are a carrier of Hepatitis B Virus, the children will be tested and you will be advised appropriately. You will have to get your own viral load, antigen and liver function test done so as to be able to be supported. Kindly prevent the children from exposure from your body fluids like blood, vomitus etc but can continue with breastfeeding.