Can't find .nomedia "folder"

I have a lot of folders that I wanted to hide, so I placed a .nomedia file in folder. I accidentally renamed a folder name to .nomedia. and BOOM all the folders including all images are hidden. I tried "show hidden files" in file explorer/manager, Even ES file explorer can't find it. Images inside folder are in gallery (but not visible `File format not supported or files are corrupted`) and images location path are there but there is nothing. I am pretty sure that I didn't deleted that folder(well at least I think, images are still in gallery but not visible), so I think my folder is just hidden. How can I see the hidden folder and images?