I might be pregnant and I need advice.

Let me start by saying I am not asking to be criticized or judged. I know, I screwed up. I'm 15 and there's a chance I may be pregnant. My boyfriend and I are against abortion, so that's not an option, I'm okay with accepting the responsibility for everything, but I have a problem. I did have a pregnancy scare a few months back and my mom noticed my period was late. Even though she doesn't know my boyfriend and I have sex, she was very suspicious the last time and told me that she was going to quote on quote "get it sucked out of me". Now, I know she can't force me to do that, but she will still try. She is very unstable and emotionally abusive. For almost a year now I've been dying to escape from her and this house, which due to many issues, it's definitely not a healthy place to live. I recently learned that in New York, there is no way I can build a court case to get emancipated. I have to be living on my own. This felt like a major defeat for me because I have so much evidence against her but the only thing I can do is bring it to cps, which could really hurt my younger siblings. All I want is a safe place with people who aren't raging pshycotics to figure things out. I know my boyfriend's family would take me in but my mom won't let me leave and she will try to force me to do what she wants. I know that I may have made a mistake, but it's something that I have to figure out, take responsibility for, and take care of without someone sitting on my chest and emotionally damaging me. I shouldn't have to feel so trapped and miserable, I need to get away from her and I don't know how, so if anyone could please give me any advice on what to do, please comment.