What kind of benefits are you trying to get? I live in oklahoma and being pregnant you can get insurance to cover everything through the state. Food stamps depend on your income and household size but you can get them before baby if you are within the income restrictions. They wont include baby until after birth though. You may qualify for wic before and after baby. That helps with milk bread eggs fruits veggies... after baby they help with fornula if you formula feed. After baby dhs will sometimes help with daycare depending on your income (must have a job). After baby in oklahoma kids can get on soonercare which is insurance for children up to the age of 19 and that pays for everything they need as long as its necessary. Also depending on your income you can qualify for income based housing or section 8. Theres a lot of different venefits depending on where you live and how much you make and what you need. Just go to dhs and talk to them.
You need to contact a county worker or go to your county building and talk to someone about your situation. They will help get you where you need to be.