Forge maps self deleting?

One of my maps i had been working on for a while did not exactly delete itself, but when i go into forge mode or customs to load the map (titled Demigod - on Ravine) it pulls up another one of my maps (Fracture - on Impact).

So i figured my map is pretty much gone since, like an idiot, i didnt ever put it on my fileshare as a backup. Has this happened to anyone else, and does anyone have any tips as to how i might be able to retrieve my beloved forge work?