I've had this a lot. Sometimes it even happens when I think it has been a good session. Maybe it's because it's sort of the highlight of my week? So even if it is good and productive, I'm a little let down because it's over. When it is bad, as it is sometimes for whatever reason, it's worse. Sometimes I think I really need something else in my life to look forward to. This week I have a colonoscopy to look forward to, but somehow it just isn't the same.