my whole terraria world on ps3 randomly dissapeared one day, all my stuff is gone! how can i get it back!??

Question

i was playing the other day and got some really rare items, i left them in my chest (mistake 1) i left the world, quit the game(mistake 2) i went back to play today and one of my characters and ALL of my worlds are gone!!!

 

plz bear in mind this is ps3 version