It is worth finding out what your state's family services covers, especially if you are low income (about $45k/year). Depending on your income your kids and even you might qualify for medicaid. There are also dozens of other programs around. I live in Ohio and there are programs for pregnant women, disabled, blind and aged. There are programs for emergency care for aliens and the hospitals usually will give discounts for low income. If that is not enough there are lots of cheaper and even free clinics for health and dental care, around here they generally work on a sliding-scale based on your income.