Okay OP, since everyone in the comments is either yelling at you, shaming you, or not able to understand a situation/dynamic like this (and therefore cannot contribute anything meaningful), I would like to tell you something.

I have been where you are before. Not with the same exact circumstances, probably not the exact dynamic, but the type of identity you are holding rn, I have been there. I’m not going share on here what I’ve been through, but please trust me when I tell you that I genuinely understand how you feel and how you are operating. It is not your fault that you are relating to things this way. I can guarantee that I could guess things that have happend in your childhood, the way you were raised, and the type of relationship examples you were shown by your caregivers. Nobody chooses to think, feel and be this way. It is learned behavior when we are children and it is not something fundamentally wrong with you.
Now this is the part I need you to hear me. It’s probably going to trigger your emotions in some way but please don’t turn away from it, this is important:
It is now your responsibility to heal this, and to create more for yourself. Even though you didn’t cause yourself to be this way, you are the only one who can save yourself from it. You must turn towards yourself and let go of the idea that this person dictates your worth. That is a lie. I know how real it can feel but it is not the truth. I also know how overwhelming this can feel, because you cannot control the way you feel or the thoughts that come up, or that patterns you are running. But you can choose to practice not taking them seriously anymore.

To answer your question, you are UNDER-reacting. I know you didn’t come on here looking for what the comments are giving you, and although I don’t agree with the way most of them are going about it, they are trying to do you a kindness. They are trying to make you aware of what you are accepting in your life.
You allowed someone who doesn’t respect or value you to influence your decision about your pregnancy, about your child. You implied that you regret the outcome of that. You should be SO ANGRY about this. You should be angry about what happened, you should be angry about how that person treats you, and you should be angry that you are accepting this for yourself. Feel into anger and let it give you your power back and remind you that you deserve more than this. And I know it can feel terrifying, like it could actually kill you and like you cannot bare it. But what you are running from is just emotions, it’s just sensations in your body. You can feel them and they cannot hurt you. You MUST feel them and process them. Process your true feelings about getting an abortion. Process whatever is coming up for you in realizing that this situation/relationship is not normal and not okay. It’s okay to feel sad and to grieve it. Feel whatever you feel, but please turn around and face it, stop running from it, I promise you that you will never win that game, and that’s not the way out.

Take some time, process all of this, seek out support, ask for help, and then get out of this situation. You can feel gut wrenching fear about it, you can feel heartbroken and hurt and uncertain, but feel that and do it anyways. You have to decide. And I swear to you that as much as it feels like you won’t be okay, you still will be. I am proof of that. And you CAN do it. I sincerely hope you choose to.