Birth fears?

Does anyone else have any birthr fears other than the pain maybe? I'm 33 weeks pregnant and the closer we get the more terrified I am my daughter will come out with lungs not developed (there's no reason for this to happen, they say she's very healthy!) but i can't help it! We've lost two babies, a little further along each time and I guess I'm just afraid she will not survive for some reason. Anyone else fear this? How did you cope with the fear?