Whats the name of this movie?? Horror?

I watched it in 2005/2006 i think,

Well wat i remember is theres a woman and her daughter on their way sum where and i think their car breaks down somewhere misty and they start walkin lookin for help and her daughter gets lost.

And the ending is them goin home but its stil misty and its quite confusing whether its actually her daughter

wats the name please