URGENT - Critical Folder Disappeared This Morning

Help -- A critical Folder went missing this morning after adding a file to a folder within the main folder. The folder is not found in the Trash Bin of any of our Users -- including mine -- and we can’t find it hidden within another folder. We’re on deadline and don’t have time to recreate all of the files. Please advise on what options we have to find or recover the missing folder. Thanks.