In addition to what rainbow listed, I would aske her what you can do to help her prior to an attack. Having a set plan in place before hand helps immensely, and just keeping a positive, neutral tone (ie: no excitement in your voice) works wonders.

One thing I absolutely hate when this happens to me, is someone saying are you ok? are you ok? you sure you ok? it just makes me think, do I not look ok? is something wrong? I know I am in the midst of one, but, is there something else going on????

You did a great job being supportive, I wish more people could be that way, PTSD is a really hard thing to live with, and the fact she stayed that long, I personally find amazing (coming from another sufferer!!).

hugs, on a job well done!

Lisa