Re: bipolar/manic depression?
I have Bipolar type 1. Bipolar is simply shifting from one extreme mood to another. Sometimes rather quickly(rapid cycling).
You have the classic depressive symptoms like: sleeping too much(or too little), no interest in daily life, lack of motivation, physical pain, suicidal, wanting to hurt yourself, intrusive thoughts, etc
Mania is the other end of the scale. Overly happy, thinking you are someon/something more important than you actually are/ needing very little sleep/a LOT of energy/talking very fast/ over spending/ hypersexuallity/ calling people on the phone in the middle of the night/ delusions/ and a lot of other symptoms as well.
Sometimes people don't experience severe mania. They experience Hypomania. That is basically mild mania.
Sometimes people experience extreme irritability/anger when they are manic instead of or in addition to other symptoms.
People who are bipolar can also have what they call mixed episodes. That is when you are depressed and manic at the same time.
I hope that helps. It's not a clinical description of Bipolar Disorder, just a summary of some of my symptoms.