T_T ...did you permanently delete it? No back-ups?
You could restore to a previous point, but I don't know if it will help (and if have an earlier restore point) if you're on Windows.

I think there are also recovery programs as the people said below, but I don't know much about them ><

Omg I really hope you can recover all those files. I love your work!

Can't you just take it out of the trash?

Have you looked into the bin? Maybe it's still there if you haven't completely deleted it from there too

If you're on Windows: https://www.piriform.com/recuva
If you're on OSX, you can try http://www.cleverfiles.com/

I haven't tried either, but I do use CCleaner and Defraggler from Piriform, and I do have Recuva installed ... I just haven't actually used it.

OOHHHH NOOOO O_O /cries along with you/

You can try downloading a recover file app (but I'm not really sure which certain ones, some may include everything you deleted) and see if your files can comeback O_O

Good luck T_T