over heating and coolant leak

ok i had some fun today went drifting in a parking lot (i got pics) im done and i look at my temp gauge its one bar up so im like no biggie ill drive to a gas station open up the hood and let it cool down, i notice that my coolant resivour is empty (thats not good) so i get some cheap watered down mix ( i know i have to use g12) and i pour it until the max line temps drop im like its all good. i go to my friends house chill theyre for a few minuets come out side and theyres a huge puddle as im driving back home my heat goes out and my car is steaming then my thermomater light goes on and add more coolant light too im scared now what should i do what could it be?