my son for the last 2 years has lived with his father and agreed to the situation because my son was determined to stay but i also have 2 other children of my own who i support all alone. i get my son every weekend and most holidays. i have been ordered to pay child support which fact i am not arguing but with 2 children and being the head of household with no other support coming in we are barely making it they tell me i have no way of lowering my monthly payments is this true?