Talking

My girlfriend has BPD and recently got pregnant. She quit her medication due to the pregnancy, and has become like a completely different person. She has become resentful towards me and taken to only talking negatively to or putting me down. It seems like nothing I can say or do will please her lately. About 6 days ago she said we needed to take a break, so I let her house where I had been staying and returned to my home. We had been discussing moving in full time together, and now I don't know what she wants. She is very hard to talk to right now, and our conversations usually result in her getting upset no matter what I say. As a result I quit talking to her for a while and let her cool off. Two days ago, she was being unclear again and blaming me for everything being wrong, and saying the I just don't get it. I finally asked her to "say it, what do you want" TO which she replied "I don't know" I love her and want to work this out. I know she is hurting, but I don't know what to do to make it better. I am hesitant to talk to her sometimes because she will bite my head off. Yesterday after she blamed something on me that was someone else' s fault I quit talking. That was about 10 am. She text me at 10 pm. And said Goodnight. I hope you have a good weekend. I responded about 30 minutes later after waking up and seeing the message and said Goodnight I Love you.

I need some guidance dealing and communicating with her. I love her and want to bridge the gap but I don't know how to do it without her getting angry. This is my first relationship with someone with bpD so I am hopeful for some insight.

Thank you