wiped my editing?

Please help

Been working on this project for days now with repeated saves to keep it updated but all of a sudden premire pro has lost all of the cutting of the video clips and placed all of the unedited videos back into the import box (?)

I'm very upset since so much work has gone into this and if it has been deleted randomly then it will turn into being very pissed with the software. 

Im a beginner so havent tried much other than looking for backups (there are non)

Can I please have some help? x