Bleeding & being RH Neg

My fiancé and I found out that we are expecting last month on the 25th. The following Friday I started spotting at work. This has continued and gotten worse and better and worse again since then. After two hospital visits (which were bullshit) and finally seeing my OB (thankful for him) we found out that I am RH negative. However I don't have an appointment to go back until this coming Tuesday to recheck levels since I've fluctuated up and down and back up again (* Can being RH negative cause this*). Just looking for some insight on other RH neg mommas! TIA 😊