How do you know for sure if you have bipolar?

In order to be diagnosed as Bipolar disorder you should at least have one Manic Episode
A distinct period of abnormally and persistently elevated, expansive, or irritable mood and abnormally and persistently increased  energy, lasting at least 1 week and present most of the day, nearly every day)
 During the period of mood disturbance and increased energy or activity, three (or
more) of the following symptoms (four if the mood is only irritable) are present to a significant
degree and represent a noticeable change from usual behavior:
1. Inflated self-esteem or grandiosity.
2. Decreased need for sleep  .
3. More talkative than usual or pressure to keep talking.
4. Flight of ideas or subjective experience that thoughts are racing.
5. Distractibility as reported or observed.
6. Increase in goal-directed activity (either socially, at work or school, or sexually) or
 agitation  .
7. Excessive involvement in activities that have a high potential for painful consequences
.What is the treatment of bipolar disorder?
Several treatments are used according to the patient's condition and include the following:
Lamictal
Lithium
Valproic acid
tegretol
In some cases antipsychotics are added
What is bipolar disorder?
Bipolar disorder, also known as manic depression, is a mental illness in which constant changes occur between high and low moods and severe depression
Changes in sleep, energy, thinking and behavior.
People with bipolar disorder may have periods of excessive happiness, activity and other periods of feeling very sad