I was jittery and shakey too. At one point I had zero fine motor skills due to "tremors", yeah right, more like quakes.
My ex pdoc's solution? Anti -shake meds. Except I had memory issues and retardation too, so that wasn't a viable option for me. I hear that side effect meds are common practice instead of taking you off the Lithium if it seems to be working otherwise.

I don't mean to share horror stories, I didn't have a good experience and hope your pdoc is helpful.