Here’s a tough one girls so I had a son in October 2016 he’s 2 he has O negative blood and I’m A negative blood .. I’m unsure what my husband is. I had a miscarriage November passed there at 5 weeks and I just got my BFP today... should I be getting anything to stop my RH negative blood attacking the red blood cells of the fetus at this early stage .. and if my husband is negative blood too does that mean we won’t produce a RH positive fetus ?? I don’t want another macrriage !