All of us jump to the worst-case scenario at times. But if you find you are too often in the grips of catastrophic thinking, these approaches can help.
People who have bipolar disorder can have periods in which they feel overly happy and energized and other periods of feeling very sad, hopeless, and sluggish. In between those periods, they usually feel normal. You can think of the highs and the lows as two "poles" of mood, which is why it's called "bipolar" disorder.