Mavericks deleted ALL of my pictures
http://tinypic.com/r/2q3qhlj/8
I downloaded Mavericks not knowing that all of my pictures that I have ever taken would be deleted. What can I do to get my photos back? I should have backed up my computer before the install but I was told it wouldn't delete anything.. I guess I should have backed it up anyway. I need these pictures back!! Please help
MacBook (13-inch Mid 2010), OS X Mavericks (10.9.2)