Definately a Thanks You, a note, letting her know you are glad she thought of you, and that she's in your thoughts and prayers, even so far a way, with the offer for her to call you, or you call her and that it would be no bother, she may not want to burden any one. If you loose her or not, hopefully not. She will know you are sending positive thoughts her way.
Good Luck {{{ Hugs to all }}}