Pregnancy (possible trigger warning)

So I’m 8 weeks pregnant and I don’t want to be with the child’s father. He is so obsessed with thinking I will be with him and he’s trying to threaten me into believing I have to be with him or him and his family will take custody from me. This is my first child, and he’s putting me thru a lot of emotional abuse saying he will rip the baby out of me, put me at the bottom of a lake without the baby in me. He is saying he will kill me do all this stuff to me. All because I do not want to be with him. I don’t want to be with him because how he is. I was at his house the other day and he stood in my way of leaving with my dog wouldn’t let me out the house, I had to call my mom get her on the phone Bc all he ever does is involve his family so it’s time my family hears and sees things I go thru. I am nowhere near unfit to be a parent I have a clean record, I been off work but I’m looking to become employed and get my own place by the time my baby is born. I have a lot to do but nothing that cannot be done. He just actually thinks his family or himself can take custody of my child for no reason. I haven’t done anything wrong to deserve this let alone an 8 week old unborn child. I just need to find a way to keep this guy away from me Bc he is a danger to me, he is a danger to my unborn or born child when it’s born. I understand he is the father but with wanting to kill me and do all these things to me just isn’t safe. I’m at a stand still Bc I feel like if I don’t be with him like he says, things will get bad and I will have to fork out all this money for child custody that’s just gonna run me into the ground and I cannot even afford it. I honestly cannot afford thousands or hundreds of thousands of dollars in child custody fines that come along with it. I’m scared to have this baby when in reality I should be excited. This is my first child. I have no resources on what I should do about this situation. I just know I need to stay away and that dude needs to stay away from me. I’m scared he will hurt me or run off with my baby after it’s born.