It might not be that you aren't dreaming, but maybe you're in a deeper sleep. I've taken seroquil before, and 25 mg knocked me out all night. I did not remember anything. That might be going on with you. Im not sure how you'd be able to dream again, without changing meds. I'm not sure that is worth it though if you feel it is really helping your bipolar symptoms. You could bring it up with your psychiatrist, maybe they would have an answer for you.