WE can try to fix map uploaded on this site, we can try to fix protected or even damaged map, but we can't bring back map deleted from your HD

There is small chance that map left stored on your HD somewhere, but if you deleted it permanently (for example using "Shift"+"Del") you should start working on new one.
Small advice:
Save all important data on USB drives, online sites or even your phone once per week or after each big progress
Another one:
Always save important things in 2 different folders (different HD partition is the best choice), this can help in next situations:
-HD crush (still some data can be saved)
-System crush (in most cases you will lost everything on partition contain OS)
-Some programs require time to save data (WE is epic example), there is small chance that PC can turn off or something happen to it, your file get permanently damaged