BEing RH negative does not prevent you from a homebirth or make you high-risk. It only means that there can be some logistic obstacles which can be overcome. You need to try to get a prescription for the shot for after birth from your doctor and try to get the medicine and your midwife will give you the shot after the birth. Some kupot won't give you the medicine and only want the nurse to give you the shot after the birth. This is ok if the nurse works everyday, because you need to get the shot withing 72 hours after birth, and you might birth on Friday morning. Some kupot are easier to work with than others. YOu can also order it from a private pharmacy but it costs 450 NIS. Ilana Shemesh