I go to stop and the pedal feels spongy all of a sudden and the pedal is all the way down but its not stopping real fast and there is a school bus stopped with kids crossing the road. Had enough room to stop before all of that it just took a long time and the car wouldnt come to complete stop with out me ripping the e-brake. So I cautiously drive home and my brakes work but still feel too soft, not where the pedal goes all the way down but they just dont bite. Before all of this happened if you really pushed in that pedal your going to fly forward and probally screetch the tires. Not now so whats up with my brakes? Brake fluid is full and I havent seen any leaks on the driveway. What would cause this?