Audrey, after you have thought this over, remember that if getting involved supporting a person will be too stressful for you or you are reluctant for any reason, it is perfectly OK for you to do what you need to do for yourself. There may be other things you can do such as suggesting other sources of help or introducing her to someone who may be able to be supportive if you think she is really in need.
If you do think that something more personal is appropriate and it is something you are willing to do, there's no reason you can't get past what might have been a "knee jerk" reaction to her earlier comment. Something as simple as asking her how she is, in a friendly manner, after another lunch break, to acknowledge that you heard and understood what she said earlier. And see where it goes from there.
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-- The world is what we make of it --
-- Dave
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www.idexter.com