Forum:Ps3 hacked

hey was just playing, and i entered a lobby, when the game started it told me to enter a password. Being curious i continued playing to see what would happen. Writing come up on screen, Saying some stuff and then Challenges Locked. I went and started a new game, and it seems like my account got hacked. All my weapon attactments are gone, and all my challenges that ive done are back at zero. My Deaths when i go to barracks is set at 420420420. Has anyone heard about this happening before?