I woud suppose if you had a baby with osmeone that also had a mental illness then the chances of your children having something would be very good.
From everything i have read and studied, most couples that both have some form of MI also have at least one child with MI.

As far as your meds go, no one can tell you what to do about that. its up to you.

But just be careful and realize that if things go really, really bad, your choices may be very limited.... but we all will still be here for you and love you anyhow.