I feel so lost

Many of you might not want to read all of this but I just feel like letting it out. 
I recently started college and it feels as if all my motivation just disappeared. I hate the feeling, I was such a try hard and motivated student in highschool but now it's all gone. I want it back. I don't want to fail and become nobody but I don't know how to gain it back. I haven't been taken my classes seriously, I've become last, and unmotivated. What should I do?? 
Also, I have a huge financial problem. My cars engine broke down and now o have to pay 2,000+ on the repairs. I don't have that money. My mom keeps bugging me about it and she said she would help but she keeps throwing it in my face. My parents make is hard to live at home. They've done/said stuff to me that I will never forget. I just feel so lost.