Below are the common symptoms of bipolar illness. What type of symptoms did you have to make the pdoc diagnose you? If you feel uncomfortable taking your meds or having no change in your mood, you should definetly discuss it with your doc. You do not want to keep taking meds, if you are not feeling better. I also wanted to let you know that some meds take from a few days to over a month to start working.
I have taken zyprexa (10mg) in the past for a little over a month, it made me sleep too much (14-16 hrs), but I didn't gain too much weigh (like 10-12 lbs over the 1 month+ I took it), but I didn't reallize it was mostly water weight till after taking it. So hang in there, and contact your pdoc, or talk to a pharmacy about it.