I definitely have this sometimes. Often, it's a case where I have more that I wanted to discuss, especially if something big came up toward the end of the session. Other times, it's because we've dug up and talked about stuff from my past, and it brings some bad feelings back. There have been times where I've sat and cried in my car in the parking lot for a few minutes or cried the whole way home (it's only a 15-minute drive). So I think it's a common thing, but that doesn't make it any less difficult or painful...