This is one of the things that has been hardest for me to learn in the year since I was diagnosed---what is normal, everyday human experience vs. what is the illness---and I'm finally getting to the point where I'm NOT over-thinking every single emotion or slightly-out-of-character behavior.

I don't know where you are in the process of coming to terms with your own illness, but you'd be well-advised to avoid driving yourself crazy (literally) by looking for signs of BP behind every late night, every stray thought. Easy enough to say, hard as hell to do, but well worth the effort.