Help??

I believe I'm 4 weeks pregnant (unplanned) and i dont know what to do. I've already had a abortion in the past and it was very hard to go through and I still think about it constantly. I'd love to keep the baby more than anything but my financial situation is shit (we live with his mom) ... I am considering adoption but I'm scared of getting attached since I know I probably will since I ultimately want to keep it. I also don't want to leave my child wondering why I couldnt do it. I'd want an open adoption if I chose to go that route but im lost... advice?

PLEASE be kind. PLEASE.

*I don't qualify for much assistance since im under 18 (I am 17) and dont live with family.*