I've had that experience coming off meds too. It takes weeks for your brain chemistry to sort itself out. It is not fun at all. You cant know for sure which way you are going to go for a few weeks and until then it is all up and down.

If they've upped the lithium and lamictal it might keep the depression at bay.

Have you tried SSRI's? I didnt have nearly as bad side effects coming off them as I did coming off SNRIs. And they have never sent me as manic as SNRIs did.

Why did you choose to leave now and not stay for a while longer? I know the feeling of wanting to be out of there though.