P: Import deleted un-imported files in same folder

I tried to import photos into lightroom from an old harddrive into it's original folder on the same harddrive. I accidentally canceled it and now all the unimported photos are gone from the harddrive. Where did they go?

Full story: 
working on a macbook pro
connected an harddrive from a few years ago with old photos to macbook pro
opened lightroom>import
navigated to the folder I wanted, selected it, selected destination folder as the same folder as where the images were coming from
started the import, accidentally hit cancel
went back to original folder (through finder), and only the initial photos that started importing before I hit the cancel button are there. They're doubled, but all the other photos in that folder from that shoot are gone. 

Is there a way to find those? Where did they go? I've searched by image name, and nothing comes up for the missing files.

Thank you.