Let it go bro. Tough luck.

there are apps on the Android that can recover deleted files. Search google play.

But a better bet would be to connect the sd card to the pc and use file recovery programs there. a good and free recovery program is Recuva http://www.piriform.com/recuva/download

in the meantime make sure you dont write any new stuff to the sd card.

Am using the Beta 1.0 version now, overall is quite an awesome rom, but with some bugs here and there, battery standby time was great but screen on time not really good imo, hardly gone through a day usage with everything turned on, (eg WiFi constant on, Data, Location, Bluetooth and everything synced in background), unplugged at 7am and reached home at 630pm with around 35% juice left, other roms i got at least 47%-57% left after a day of usage.

And another thing, games getting slower and laggy from time to time, but not a big issue for COC and Fallout Shelter.