You need to be more clear when asking for help, help us help you. Were you on a touchwiz rom before flashing a 4.3 rom? Your backup might be gone now if you odin'd back to stock.
Try connecting your phone to a computer and see if you can find you backup, if your back up hasnt been deleted, it will be in a folder with the same name as your recovery (TWRP, CLOCKWORK MOD RECOVERY OR CWM).
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