I was on Lithium for about 7 years. I had a lot of side effects from it, but most people don't. You have to make sure she checks your levels frequently, and absolutely no more NSAIDS. I was on 900mg twice a day, too.
I think you have a friend or family member who has a bad tremor from Lithium? If you develop it, you can stop the med or lower your dose. In my mind, a significant tremor is not okay.

I took Vraylar to break an episode. It was never meant to be permanent. It worked very well for me quickly. The only side effect I had was related to my kidney disease. So, unfortunately, I can never take it again. I got samples from my pdoc.

Is the Vraylar supposed to be temporary or permanent?
Is she keeping you on the Geodon, or taking you off of it?

I know that this transition must be scary (((HUGS)))
But it seems like it's time for a change. I think everything will be okay as long as you stay in close contact with your pdoc.