Whenever someone links to my website via facebook, an icon shows up next to the link. However, the picture that shows is one that I uploaded temporarily one day and then immediately deleted. I have scoured my media files through my wordpress dashboard, as well as every single file in my uploads folder, and I do not have this image saved anywhere, nor is it set as the featured image on any page. How then can it be the image facebook is choosing to portray for my website, and how do I remove it?
(If I click "copy image address" on the facebook icon, this is what I get:)