Well child support is based on him having a income and he is in jail. So I'm not sure how that works? You may qualify for welfare and you can get WIC.
My sister in law is in the same boat she is in school and raising 3 kids 2 with a dead beat and he won't pay child support she had to get on state insurance and what they call fip here its a cash program to help out and the dad will have to pay all that back to the state eventually or stay in jail with no licence or any tax returns ever till it and she r paid hope this helps :-( good luck
you should be able to get help through the state like being on WIC which would cover formula and some food..... I don't think there is any state that will pay you child support