Thank you-

Lithium orotate could be an option. Your description of how it differs from lithium carbonate makes it sound pretty good.

I have stopped lithium for a day and a half, nothing else like diet changing, and already there is some improvement. I am seeing the doctor on Monday (6th Jan) and will speak with her about it.
I hope I'm not taking to big a risk without lithium. I guess the Seroquel will help keep things stable, not letting me float too far from the earth or sink too deep. Though, lithium is probably the thing that does the most stabilizing.

Fingers crossed!