Abortion due to chronic insomnia and lack of support

I'm 29 years old and I really want an abortion but my boyfriend and 9 year old sons father is threatening to kick me out if I have one. I haven't slept more than 3-4 hrs per night since I found out I was pregnant. I'm now 13.5 weeks pregnant and feel like I'm anxious and depressed because of not sleeping and lack of emotional support. My Mother and Father are alcoholics that live in another state so living with them is not an option if he kicks me out. I have no other family. What should I do? I want more kids but I can't take the constant insomnia anymore. It's making me sick. If I keep the baby, I will at least have a roof over my head and food to eat. I am a stay at home mom and I don't have a car. My options are extremely limited.