You can go to your state offices and apply for financial assistance. It will be a few hundred dollars per month but it will help. Then you can also file for food stamps too. That will really help since you'll need to have food. You should have some community resources for financial assistance too. There may be agencies that will pay a portion of your utilities or give out free food to you too.
WIC is a program through the health department that will give pregnant women food that will help the fetus grow strong and healthy. Then when the baby is born it will still give you some free foods but the biggest thing is formula. Unless you are going to breast feed, in that case you'll still get some food to help you keep your milk supply strong and your body healthy. As the baby gets older you'll start to get dry cereals to be mixed with formula then 100% juice, later on after the baby is 1 year old you'll get several gallons of milk per month, peanut butter, whole cheese, eggs, bread, fresh fruit, dry cereal like Rice Chex, Cheerios, Honey Bunches of Oats, etc...lots of good stuff.
All you have to do is apply. These things will be free to you. Once you return to work you can also get free child care, or at least the cost should be minimal to you.
There are many many programs out there for a person who needs it. Please go fill out the paper work so you can get started on it sooner than later.