Hello friend!
When it came to recovering my accidentally deleted files from iPhone, nothing worked as good as
https://www.pandorarecovery.com/recover-deleted-files-mac.html . Btw, I've also just performed the back up successfully, so I'm 100% positive backup files are being stored in secure. So just fr future - always backup you files. It will take you a few minutes, but can save you tons of effort in future.