The Mégane II Owners' Club

hope this is in the right place...anyway on monday was driving home from work when i got caught in a monsoon everywhere flooded bad driving conditions anyway got in the car yesterday and when i braked the brake pedal was bouncing as if i was hard braking & abs kicking in.no warning lights on dash everything good still brakes as it should just the bouncy pedal.any ideas...
megane cc 1.9 diesel priv 130.