I think it's interesting that your doctor has you on an upper and a downer. Meaning perhaps you need the ambian at night because the adderall keeps you wired during the day. I had a doctor do that to me before I was diagnosed and yes it treated the symptoms but I was so wired during the day that then I required a tranquilizer at night. It turned out for me that stopping both drugs and treating the underlying cause worked better.

Definitely talk to your doctor. Perhaps by treating the bipolar disorder everything else will sort itself out. Also, I found it easiest to change only one medication at a time because then I knew what effect it had.