My moods are insane. In the last few months or so, they have been shifting from a 10 to a 0 every few hours with no pattern whatsoever. It's always something tiny (like trying on a dress I don't look good in; it can make me want to curl up in a ball and sleep for days even though I had felt indestructible and on top of things all afternoon), or sometimes nothing at all (I'll be sitting alone at home doing nothing and suddenly 'switch'). I suppose it could be hormones, but I am pretty much out of my teenagehood and have never had such unstable emotions before. My moods fit perfectly into the description of bipolar disorder's mania/depression, but they change way too fast for that to be the cause... What could it be?