Dear Sharla,
It is normal to be upset about being followed and almost having your stuff stolen off a standing room only subway.

Perhaps you are feeling beleaguered in the crowded city. I wish a local person would give you more tips about how to go from place to place.

BTW, I would not carry a back pack on a subway. Keep your stuff in front of you so you can keep your eyes on it.

Let the therapist know everything.
I hope she helps you.
M.