Kaalubaby, congrats. You mentioned that a pregnancy might cost 8 to 12 k. You might be surprised to hear that last month I had a baby (a normal delivery) and 2 night hospital stay for mother and the baby cost 18k, let alone the prenatal care visits. I can't even imagine what would it cost had it been a C-section. This is just for your information so that you don't get a shock if you get a bill of more than 12k. 

Ok here is what we did when we had our first baby (we were on F visa). We went to the county health department and asked for options. Then we applied for medicaid, unfortunately which was denied the first time. We reapplied and then finally the application got approved. Keep in mind that medicaid pays all the bills right from the beginning of pregnancy, so just keep the bills on hold. We didn't pay a dime. Then after the baby was delivered the medicaid was transferred to the baby. So just go to the county health department and talk to social workers. Even if your medicaid application is unsuccessful, your bills might be waived. There is another instance (not pregnancy) where we racked up 7k hospital bills. We applied for financial assistance and finally paid only about $300 dollars. 

Hope that helps