Sleep studies are definitely a good thing, especially if you're having issues without the Seroquel. I used to fall asleep in meetings, nod off at the wheel, and basically do whatever else is done by someone who is sleep-deprived.

Had a sleep study, and was diagnosed with severe sleep apnea. I started using a CPAP, and things got better very quickly. Not saying this is the issue in your case, but it was a revelation to me.

If you're looking for meds to suggest to your psychiatrist, my suggestion would be to look into Latuda. It's an atypical AP which is indicated for BP depression. It helped pull me out of a severe depression, and I've found no negative side effects from it. Definitely no sedation, which I know concerns you.

Best of luck with your medical doc, and with your upcoming psychiatrist visit.