None of this sounds terribly encouraging. Sorry.
Your post is very informative. I welcome suggestions on getting her psychologically prepared or defusing the bomb after the fact. Also, what is a bare minimal time span from the time she arrives and the time she is asked to go on a trek for the sake of her city? If it helps to know, two of her friends are also called on to go on this quest.
Though she will be transported in time, she will remain in the same place. Her sisters and some other family members are still alive, the house is still in the family and her bedroom untouched, some of her friends are still around, her youth pastor is now the senior pastor of the church and there are remnants of the city she knew.
Jeanette Isabelle