Miscarriages and Negative Blood Type

Kaya

I am currently having my second miscarriage in 9 months. I am curious if anyone who has a negative blood type knows if there is a link between blood type and miscarriages? The last two pregnancies I had small bleeds (no spotting just seen on an ultrasound). Not near the sack and doctor said she wasn’t worried about them but now I am wondering if because I was bleeding could that have anything to do with why I am losing the pregnancies?