I Forgot the Name of That ___! discussion

The book is about a girl who faints whenever she get reminded of her father or sister( her sisters name was Cynthia) Her father and sister were both dead and the girl lives with her mom. Even the simplest things remind her of them. Oh, and I remember a part when a boy
At school was driving her home or to school or something and he was speeding and she looked nervous because she was scared of speeding ,because her father and sis were killed in a car accident. Well, that's all I remember, so please help if u can :)

Ok so turns out I had a list of all the books I'd finished reading, and I found that book and its called: "Broken" By Dean Murray