O- negative blood type

Today I found out that I have o- negative blood type and I didn’t even know! At my appointment today they had to give me the rhogam shot because I’m 27 weeks and 5 days. I was in shock I was worried that maybe this is effecting my baby and I don’t even know? My first pregnancy ending after 15 weeks and the previous doctor never mentioned anything about my blood type or the baby’s blood type. They didn’t even do further research to see what may have caused my miscarriage. And now I’m thinking what if it was because of my blood type? But if so with this pregnancy shouldn’t they have told me what my blood type was way back in the beginning? ( currently seeing a new doctor ) not until now? I did the antibodies test last week that’s how they found out I have o- negative blood and gave me the shot but if I’ve had this blood since the beginning do you think it might had been affecting my baby and they just didn’t see? Any moms who has this same blood type have a healthy labor?