Lost email while filing in Apple Mail

Hi gang. I am trying to locate a missing email. Today I created a new folder in Apple mail and then used the “move to” selection to move the message to the folder. The destination folder was in my iCloud email and the original email was in my Yahoo account. All of this action was occurring within Apple mail. The email never made it to the folder. I ran a test and everything works fine now except that very first email is gone. I was on my laptop. I checked all of my iOS devices to no avail. I did a spotlight search, and checked the yahoo web mail as well. I even went through other folders in case I clicked the wrong folder.

Thanx in advance for any ideas.