I'll skip my dx story. And maybe I'll come back later to read through others' stories, but I quickly wanted to say that's wise advice from Christina -- be sure they rule out any physical causes first.

The other thing I wanted to say, because you wonder if your being happy is hypomania... The thing to know about hypomania is that it needs to be problematic in your life. Excesses and stupid decisions with negative repercussions causing damage in your life for example. The behaviors also need to be atypical to your regular personality.

Hope that helps some.