Photos lost from iPod touch after being powered off |HELP!|

help please!!!!

so I backed up my iPod touch 4th gen to iCloud and all 3 days ago as well as updating to IOS 6.1.5. Then I powered it off. Tonight (3 days later) I turn it on, connect to the wifi, and go to my photos. I had about 800, now it says it's restoring 1,267 of 3,012.

what has happened??!!

please help ASAP going away tomorrow!!