My mother-in-law is bi-polar & I suspect that our son (9) is too - our daughter (16) well it's hard to tell with teens. Both have extremely high iq's & this also has a major impact on moods/behaviours etc so that adds to the problems of diagnosis etc.
There are nearly always ways around problems re meds & being pregnant, I think the main issue really would be to make sure that your psychiatrist, your local dr & your obgyn all understood your bi-polar & meds & that they communicated with each other & with you & also that you did alot of research to check everything out yourself (which you sem to be doing).
Your sleep problems (another post) & dreams etc may well relate to stress re wanting a baby & fears on the subject. As to dealing with the issue if the child(ren) is bi-polar that really isn't an issue. Think about it, babies don't come with guarantees, they may or may not have problems regardless of the parents medical histories. They may have an accident & require treatment - you can not predict any of this so don't worry about the bi-polar possibility (in any case medical knowledge & treatment is improving constantly & your own knowledge would also aid in diagnosis, treatment & understanding etc!!).
Good luck & enjoy trying!!