Am I bipolar?

I was on a gizilion anti-deps and had horrible side effects or they stopped working. I kept feeling terribly depressed or wonderful. One day I would be unable to motivate myself to do anything and sink into a hole and then for about 2 or 3 days I would be in a great mood, clean my house, organize everything, go out with friends who I had been neglecting, etc...

The psychiatrist said that I had depression for sure and possibly bipolar II. He gave me lithium and an anti-dep. I stopped the anti-dep (hate taking too many meds and he said he planned to wean me off them).

Doing great on lithium alone. Feel very tired on it, but other than that I have been stable for 1 month (been on therapeutic dose for that long). Does that mean I'm bipolar?