Hmmm, when I was taking sleeping med this did happen to me. I quite for about 9 months and then when I restarted I was ok. But now I only take them when I am acutely manic. Thing is when I am very manic, almost nothing makes me sleep at all. It's not good, that's wound me up in the hospital. Tho they did get me to sleep by severely dosing me up on several strong sedatives at once.
I really hope you find a way to sleep. If your like me and it sounds like you are, sleep is a must for not getting to manic.
For the last week I've gotten about an hour or two a night, I know it's bad and I am definitely going up, right there with you. I don't have anything on hand except for many different antipsychotics which I am not currently on. And for some weird reason I am afraid of melatonin.