File disappeared from iDrive

Hi, a file (Excel spreadsheet) which I use regularly has disappeared from my idrive. I definitely didn't delete it but it's no longer there. I logged into icloud via a browser and looked in the Recently Deleted section but it isn't there. I also checked my computer recycle bin and it isn't there. I searched my entire C: drive and it just doesn't exist anymore although the shortcuts to it do. Any suggestions? Thanks