Been there, have the kidney damage to prove it. Perhaps it's not that you're not on enough, but that you're on the wrong ones. I've been on many meds at once and very unstable but now I'm on three and haven't been in a bipolar episode in a few months. It takes a long time to find the right mix, and that mix may not last forever, but every stretch of stability is worth it.

Keep working with your pdoc. You'll get there