Yes Hun I am. I am negative and my hubby is positive.
My first two sons are both Negative however my 3rd son is positive.
My 3rd pregnancy was very different, just felt like it took alot out of my body. I missed carried in between my 2nd and 3rd and had that RhoGam, it's this blood injection, so that is why I was able to carry my 3rd son with no problems. If I didn't have that miscarriage I would have had that injection at around 28wks just to be sure. If bubs turns out to be positive like mine did, you will also have another injection after birth.
Most mothers with Rh neg that carry a positive are ok, it is only a problem if the babies blood crosses into your blood stream ( that why you have the injection at 28wks). Your doctors know about it and they will monitor you through out your pregnancy. I wouldn't be to concerned.
I hope I have helped a little.