The two of you need to be on the same page as much as possible. It seems that you are mostly having communication issues, with you trying to figure out exactly what he is meaning when he says you won't need to work *then*, but you do need to work *now*; and some of the other questions you're having. It may just mean the two of you sitting down at the kitchen table, laying it out on paper, and reaching an agreement, where you clarify some of these questions you're having, and saying things like, "Ok, when you say I won't need to work for six months after the baby is born, but then complain that I 'don't contribute enough financially' now, it confuses me, and I need to know -- are you planning on financially supporting all three of us for six months after the baby is born, so I won't have to work, but I need to work now? I'm a little confused."
Marriage (or pre-marital) counseling would be in order with a good counselor, so you can work through these issues now. Like it or not, you are stuck with this guy for the rest of your child's life, whether you get married or not. What will be best for you and him and your child, is for the two of you to have a happy marriage, but you've got to work on better communication now, or else you'll likely split up, whether you get married or not. Even if you don't get married, it will be best for your child to be able to communicate with his/her father and be on the same page as much as possible.
If there is a church in your area with a counseling ministry, that may be your best bet.