Is there such a thing as too much tea?

So today on my day off I wanted to try some tea and I did 2 gong fu sessions. First a raw pu'er ball and second an oolong. So for both sessions I did 8 steeps in a 100ml gaiwan. Adding this together would be 1.6 liters of tea over the course of 6 hours. Is this too much? What are your experiences?