Thanks for these replies. I actually posted a reply yesterday but I'm in moderation and don't know if it, a quick-reply, went through.

But the answer that question, I usually cry when I feel slighted/ignored, when I see in movies people suffering the same types of traumas I have (the feeling is like grief), when someone is being kind to me (don't know what that feeling is--fear of trusting?), or when I see a suffering animal or injured plant.

It sounds like this may or may not be ptsd related....