Fast Driving And A Brake Failing NIGHTMARE!

Description: I was fast driving on some back roads trying to hurry up and make it to a little get together at a picnic with my friends! apparently, i was the only one they were waiting for so i need to do some pedal to the metal action so i can meet up. all of a sudden, i noticed my brakes keep sinking deep into the carpet after every press. i thought nothing of it, until it became worse! this is operation panic! every after drive i am doing, i constantly mad stomping the brakes and my car is not stopping!! omg! what is this??!!