I'm not sure where the line is, over the summer during my really bad periods I think I may have come close and was seriously considering it. On one occasion I phoned the Samaritans as I was an inch away from harming myself and trying to hold it all back as I also have a kid (grown up though) so could not do that to her. It's hard because mostly you're just about clinging on in some way, the really really bad peaks come and then mellow a little as you manage to carry on another hour, then that hour becomes a day and so on.