There are two sides to having bipolar depression: the manic phase when you feel full of energy, and the depressive phase when you struggle to find the energy to get out of bed.

Manic symptoms include:

Boundless energy
Feeling high
Hyperactivity
Agitation
Irritability
Racing thoughts
Feeling invulnerable
Risk-taking behaviors
Overspending
Symptoms of the depressive phase include:
Lack of energy
Lethargy
Sleeping too long
Loss of enjoyment
Worthlessness
Feeling hopeless
Difficulties concentrating
Forgetfulness
Poor diet
Feeling suicidal

Manic phases can last for several weeks in severe cases, and depression for many months. The continual struggle to manage these opposing states of mind means people who have bipolar depression often find studying or work impossible.
Having bipolar depression also has a significant impact on personal relationships and your ability to manage your finances or keep yourself safe.