Thank you very much for that link, Perna. It's a very interesting read.

It could partially explain why I can so easily swing from feeling as though things are going to be okay, we're going to make it, to feeling depressed and scared that it's only a matter of time before it happens again.

I'm definitely used to some level of cycling as a BP II, but I've been like a yo-yo lately, literally unable to predict how I'm going to feel from one day to the next. I never really considered that my inability to sleep may be contributing.

Thanks again.