How do you know if you are bipolar?

Bipolar: Periods of agitation, grandiosity and lack of sleep, alternating with periods of sadness & lack of energy and appetite changes, basically highs & lows.

Psychiatric eval: Mania or hypomania: aggression, agitation, v judgment ; impulse control, distractability, rapid thoughts ; speech, ^ libido, v sleep, spending sprees, high risk behaviors, elation, ^ physical activity or psychosis. When depressed 1 may have low mood, v energy level, v concentration, amotivation, ^ or v sleeping, ^ or v in appetite, poor self esteem, feelings of hopelessness or helplessness.