Chai green tea help!!!?

what are the side effects of chai green tea i know it could do good but what hyappens if you drink to much of it...i drank 16 cups of chai green tea without sugar o ranything one day and my heart started to hurt idk maybe it could of been from this tea idk...ohh and my mom drinks alot of tea to and her ribs hurt or around her rib area hurts when she bends down and her liver sharp pains any ideas why thanks.