I use a mood chart--they are so helpful (as long as you chart every single day--which sometimes is a challenge for me). If you are feeling at both ends of the mood spectrum, check both. You're a rapid cycler??? I am, definitely. My moods can change many times in one day; and also week to week. It's awful. Feeling both up and down can mean a mixed state as well. I feel with my rapid cycling I experience a lot of mixed episodes.
So, I feel especially those of us who cycle like this, a mood chart is essential.
Bipolar II, Anxiety/Panic Disorder
Clonazepam .5mg as needed, Trazodone 50mg/day & Lamictal 200 mg/day