Birth control baby, not financially ready

My husband and I are terrified. I am 20 this month and my husband is 25 this month. We got married 5 months ago. We are very in love but very underprivileged. I work, he works, and we barely have money to survive. I don't know how we are going to afford this baby. I have PCOS and never thought I'd be able to get pregnant. But instead, I got pregnant on birth control. I'm scared. beyond scared. I am very in love with the life growing inside me but have no earthly idea how we will care for them. My husband feels like a failure for not being able to provide, especially when I'll be home taking care of baby. We are happy for a child but absolutely terrified and I have no idea how we will get baby items and diapers and wipes and everything we need. I'm so scared. I want to provide the world for my baby. O luckily got medicaid now so I can go to the doctor and get care during the pregnancy but that's all I have.