Nathan's medical expenses

My son Nathan is 2 years old and has a twin sister. They are admitting him to Brenner's Childrens Hospital within the next 24 hours. He has been diagnosed with Failure to Thrive along with seizures, malformed head, cleft palate, eyes not tracking properly, and failed his hearing test. His insurance takes care of him but it doesnt care of expenses of the family or myself while I am there. I don't know the unforeseen expenses that will occur while he is admitted in the hospital. I do know I have to pay for my food and other incidentals surrounding his hospital stay.