Mixed-State Ultra-ultra Rapid Cycling Bipolar Disorder Type 2 is...
... See the lists for "Depression Is...", "Hypomania Is...", and "Anxiety Is...", combine them, and have them pop up randomly at any time of day, any day.
Sometimes scenarios off of 2 or even all 3 lists can show up at once. Sometimes it's more than one scenario from one list all hitting at the same time. Sometimes in the morning, you start with scenarios from one list then at some random point in the day, change to another. Sometimes you can stay on one list, cycling through many of the scenarios on just that individual list for days, weeks or months.
The only thing you know for sure with this disorder is that no matter how you feel at the moment, that feeling will eventually change with a different scenario or list heading your way. Though it's possible for it to change into stability, even then it's temporary. The lists will return with a vengeance. Medicine, therapy, support groups, and supportive friends and family can keep you in stability longer, but there will be a point where it leaves and the lists attack again.