GBS+ Fear for my baby b/c hospital doesn't seem to care like I do?

My caregiver told me that if I come in before my contractions are 5 minutes apart, they would only send me right out and back home. They wouldn't even check for dilation. This is my third pregnancy and my second with GBS+. So I can't even begin IV antibiotics until they admit me at 5 min apart. I'm scared I won't have the 4 hrs necessary. When I brought up my fears, the midwife said well women don't get the antibiotics all the time, and I've never seen a baby get sick. And I asked if they would give the baby antibiotics if I wasn't treated, and she told me no. So basically, I have to hope that I have 4 hrs after they admit me before I give birth. They don't seem to care, and they won't do anything unless my baby gets sick, which is a serious infection. I looked at her nearly crying and asked, so you aren't going to do anything unless my baby becomes infected and gets sepsis, pneumonia, or meningitis and her life is in danger? And she just kept saying that the baby won't get sick even if I don't get antibiotics. By this point I'm crying and said I don't want to lose my baby. Still the same answer. If I go in at 5 min apart, what are my chances of having enough time? What dilation were you at that point? I know every woman has a different experience, but I guess I'm looking for some sort of reassurance. I'm 39 wks, this is a military hospital, and I have no choice but to go there. So I'm not permitted to look for another hospital/doctor that would make me feel better about my baby's care. So please no answers about doing what's best for my baby and going somewhere else. I can't, oh how I wish I could. My baby, my children, mean more to me than anything.