Quit 6 days ago and have found myself incapacitated by depression. I'm on NRT but still can't sleep and feel extremely despondent during the day. Because I'm not quitting CT and still depressed, I figure it's because I've been dealing with my emotions behind a cloud of smoke and now it's not there? How long does it last? I didn't get any work done at all last week so I need to at least be semi productive next work week. Thanks!