I didn't answer your Q before, because I didn't know what to say. I just came up with it, and your Q has been deleted. If your question was genuine, here is what you do:
It doesn't matter who the baby's father is, you don't need to notify any of them. DON'T have an abortion (it will tear apart your soul). Give the baby up for adoption, closed adoption. Someone will feel very lucky to have that child. And it does not seem that your life will be suiting for a child. THAT is what you do. That is my honest, very heartfelt advice. I hope you take it to heart.