Hi Chelle,
Hooray -- I'm back!! Now, let's get on to business...!
There are online bipolar tests, but they may be a bit hit-and-miss (not sure how *scientific* they are: they're normally seen as something that indicates whether or not you should get more comprehensively screened by a psychiatrist). My advice would be to get a full evaluation from a psychiatrist (the only type of medical professional qualified to diagnose and prescribe for this condition). You might also want to look into some reading matter on bipolar. The best book I have encountered that can help guide you through this and add to your insight on the condition, as awell as help you to see whether ot not you have it, is (and, as I *always* recommend this one, there will be a huge groan as people read this -- I promise I am *not* related to the author in *any* way!!) David Miklowitz's "Bipolar Disorder Survival Guide": much better than any online "check the boxes" evaluation.
If you really want to do a web test, though, there's one at http://www.dbsalliance.org/questionnaire/screening_intro.asp
Good luck hun -- and keep asking anything you like!!! :)
Rosie x