Half my photos are completely missing after attempting to export, what just happened??

When attempting to export a few hundred photos, I noticed a few that could use some minor tweaks in the export screen, so I backed out and made the edits, only to realize the first few hundred I edited are now completely missing. Not even in the deleted folder, and the raw files can now be re-imported as if they never were in the first place. Am I completely screwed and now need to re-edit? I have never had this happen before.