lost my brakes this afternoon the pedal went to the floor came back a bit with pumping dropped the kids off at house then went to rip off fords(halfords) for some brake fluid as I thought I had burst a pipe ten quid for the fliud came out got in and the brakes were back but when I brake hard and get like a pinging noise and a clunk from the abs , the abs light and brake fliud light never came on when I lost braking any ideas whats wrong