Good day girls, I have negative Rh factor, second pregnancy, first bab…

Good day girls, I have negative Rh factor, second pregnancy, first baby died after 3 days without knowing from what they put asphyxiation of the newborn, now they offered me an injection immunoglobulin anti-bodies, there is no yet, by Doppler also everything is good, I don't know what to do, husband and relatives don't want to say they gave birth before without this injection and you give birth to someone with negative Rh factor, please share, I already don't know what to do, I'm afraid to lose the baby again, so scared ???