i was already taking lamictal, and when my pdoc added lithium to my meds, i felt the best i could remember. honestly. and not in a hypomanic/manic way. just a stable, amazing way. i would have loved to have been able to stay on the lithium - unfortunately, i developed a rash from it after about a month, although it took three more months to figure out it was from that med. i don't think this is a very common reaction, but i'm not sure.
sorry to hear you have to stop the ECT, but perhaps the lithium will work great for you instead