I realized this about my own mood swings.

I tend to do a lot of "writing therapy" in workflowy. Thus, if I'm ever at a high, or a low, I record a lot of my thoughts into workflowy so that I can refactor/combine them later.

I like model this as "emotional retrograde amnesia". I like the movie "Memento" by Nolan because the protagonist writes lots of notes to himself because he has actual retrograde amnesia; similarly, I have emotional retrograde amnesia, so I write lots of notes to myself, so that I can piece together the "puzzle" later.