No idea what to do..

When I was 16 years old, I had my beautiful little boy, with a guy I loved with all my heart. About 2 months after our son was born, he took off, he wasn’t ready to “grow up”. My son will be 2 in February, and his dad started coming back around again in September. We reunited, and tried to work out our relationship again. Needless to say, I couldn’t let go of our past, and I couldn’t allow myself to accept the way he treats me so horribly. I left, only to find out I’m pregnant with his child, again. I’m now 18. He nearly caused me my job, so I’m on a probation period of no more than 15 hours a week, and only getting minimum wage. My son’s father came to me today, told me he lost his job. That also means no child support. I was receiving about 400$ a month in child support. I have no where near enough money to support myself, plus two children. I forgot to mention, I live with my parents. My mother told me I have to be out on my own before the second baby is born. I cannot afford that either. I’m not sure what to do. I don’t think that I could ever really consider abortion, but I do think that maybe adoption is the right choice in this situation, although, I am not sure I could bare the pain of giving a child away to perfect strangers. I am not sure what to do. I have absolutely no support at all. I have no friends. I have very little family. I have no one. My ex was so controlling that he was all I had, and now that I left him I am left with nothing and no one. I don’t know what to do. Someone please help with some advice?