I know how you feel. I have the same problem when I don't sleep I get manic and although for me being high is much better than being low it have a detrimental effect on my life.
I have stopped my seroquel (my p-doc was on leave so I couldn't check in with him) but now I am having a lot of trouble sleeping, I got a prescription of Zopiclone from my GP to help. I am not looking forward to my next appointment with p-doc he is going to want me back on it.