I'm scared. I have always been pro-life but I think my only option now is an abortion :(?

My boyfriend and I broke up almost a week and a half ago. I found out I was pregnant Friday and my ex doesnt want anything to do with me or the baby. I have a 2 1/2 year old son that was taken from me in March b/c his father hit me (but not him) and I felt guilty on holidays so I let him see him. I already have to wait until October or April to get my son back and Im afraid theyll take this baby or never give my son back. I love children but I cant do this alone I dont even have a place to stay I have nothing and I dont want this 5 week old baby to come into such an ugly world with nothing ...please someone talk to me :(