Iggy, I hope you figure this out soon. Bipolar is no fun at all, as I'm sure you know (well it can be fun sometimes, which is the problem)

Are you eating the same as before and gaining weight anyways? Or have your eating habits changed? If it's the former, then I would discuss other med options with your doctor. If it's the latter, that's something that can be helped with talk therapy and behavior modification. Figuring out the base of the problem is the first step to solving it.

Best to you.