I'm almost always able to sleep like you've done, but then I also seem to almost always drag along in a low grade depression. -Except this morning, today I woke up at 5 energetic and alert.-

I'm sorry you're not feeling well, and I include your cat in that.

I wonder, are there other indicators which might hint at the onset of an episode? I'm thinking of being more emotional or isolationist in the days before the long sleep?

a'best