Chlorine water

I was just wondering if drinking chlorine in excess would be of any harm to our human body. Hmm. If it does, then I'm probably gonna die really soon cause I think I probably drank like a few litres of chlorine in the pool earlier on. Went for a dip in the pool after tuition with Y. We did 10 laps. Felt so accomplished. Never really did more than 6 laps in the past. Oh, and I finally mastered the semi-frog style! I even managed to keep my head afloat while swimming. Awesome.