(i was also on zoloft and subsequently was diagnosed with bipolar II..... i even wonder if it is true bipolar disorder at all, or simply the zoloft.) check out this website for a quick overview on articles about the relation between ssri's and bipolar disorder :

http://www.neurotransmitter.net/admania.html

im just telling you because of my own bad experience with zoloft...i seriously hate that med! i just hope you have a better experience with it than i did.

at the moment i am not on any meds...