For not being sure I want a kid

I (31M) have been with my girlfriend (31F) for almost four years. It's been on and off for the past two years because I was drinking a lot on the weekends. Last summer, we decided to break up, and we both saw other people, but we still spent time with each other, which led to conflicts and jealousy. By the end of the summer, we decided to get back together, but since then, her confidence in me hasn't been restored, and this has led to a lot of fighting. She tells me she doesn't feel wanted or loved, and I also feel more distant. Fast forward to two or three weeks ago, we had a huge fight, and I rented a U-Haul to move her out of my place. However, we talked it through and decided to stay together. Last week, she told me she was pregnant. I was happy at first, but then doubt filled my mind, and I'm not sure I want to have a child with her. The problem is, she has already told her friends, and now she's upset with me because I told her I initially wanted the baby, but now I'm not even sure I want to stay with her, let alone have a child. AITAH?