Hi myoasis89 Here is a link to a booklet on bipolar from the Mood Disorder Society of Canada website. The booklet is on the left hand side and can be downloaded for free.
http://www.mooddisorderscanada.ca/page/quick-facts
I would also suggest tracking your mood. I use this online one
http://www.medhelp.org/land/mood-tracker
For a diagnosis I suggest speaking to a Psychiatrist. You can ask your GP for a referral. Hope that helps.