If you have two B’s and a C, does that mean the rest are A’s? What grade are you in? Because that sounds like a pretty good GPA to me.
Are you frustrated because you have to retake the class? If so, I empathize; that’s really rough. Still, it doesn’t sound like there’s much you can do except move forward and try to continue to stabilize your home life.
Either way, I hope things get better for you soon.