To be honest, online mental-illness quizzes aren't terribly accurate. My pdoc actually laughed when I told him every single one I've taken over the years showed I was bipolar. Turned out that I am indeed bipolar, but the way those tests are skewed I think the Statue of Liberty would come out that way.

Seriously though, if you even think you might be suffering from bipolar disorder (AKA manic-depression) it would be worth it to see a psychologist or licensed clinical social worker, at the very least. Many counties have a mental health division that charges its fees on a sliding-scale basis; I'd start there first if you have no medical insurance and little cash. If you have a job, you can also check to see if they have an Employee Assistance Program where you can talk with a therapist.

A word of caution, however: if indeed you do have bipolar disorder, DON'T wait to see if it gets better on its own. It won't. In fact, ignoring it will make it worse over time and it will be harder to control. Good luck to you.