I really need advice for please

I am 17 .. I am 16 weeks pregnant .. I am in the foster care system but I have a job and I'm leaving soon when I turn 18 my foster mom is a crazy bitch she is spiteful and stressful she let her kids rip a 400 dollar check of mine just because she was mad at me she yells and puts her fingers in my face and before I was pregnant I would have beat her ass but I'm trying here .. it's always something with her .. thing is I can leave to a group home BUT I can't have a job until I've been there a month and have no car YET I'm so close to having it (if I had the money from the check I would have had it already ) but I don't think that would look good on me and would shorten the money I'm saving  .. what should I do?