I'm RH negative. My first pregnancy ended in a miscarriage at 6 weeks. I then had to get a Rhogam shot (I may have spelled that wrong) to protect future pregnancies. I had to get that shot again when I had spotting during my pregnancy with my son because their concern is their blood mixing with yours and causing a miscarriage. I had to have it again at delivery, to ensure safety for future babies. I am currently 21 weeks and will be needing that shot again soon or even sooner if I have spotting. It's a pain. And a lot of extra shots. But try to rest easy that you most definitely CAN have healthy babies. Just gotta be careful.
I'm on my third pregnancy and I'm only negative. You have a special injection at 28 weeks I think it is and again after you've had baby. The only thing you have to worry about is having a major bump or fall but apart from that it's not much to worry about :)
I think you just need to get a special shot from your doctor and everything will be fine.