You're hanging in there I see. I am glad that you are doing well.
Unlike you, when I came off lithium, I did it cold turkey (this was all my doing, my pdoc had nothing to do with it). I don't recommend that to anyone. I was sick for about a week or maybe a little more. I had the shakes, I was anxious/restless, irregular heartbeat, could barely sleep, abdominal cramps and other gastrointentinal issues, pounding headache/tunnel vision, etc.
You probably don't have the major symptoms that I had because you are weaning yourself off slowly, which is how it is recommended.
Sorry if I scared you there. But at the time I was also taking other meds, and that probably made it worse.