What you are probably seeing are the previews, not the actual images.
You need to resolve the missing folder problem.
Thanks for replying! But how do I resolve the missing folder problem? I think it's missing because I deleted them all because I didn't know that I was sending them to downloads. So I deleted all of my downloads by selecting all. The lightroom folder was unknowingly included These pictures that are in the previews can't be retrieved any other way?
The previews are not your actual images. There might be some utilities or plug-ins that might know how to salvage some images from the previews, but I don't know of any.
Since you deleted your images, check your "trash" folder to see if any of them can be recovered.