Hi there,
It won't be possible to restore the document that was not saved. Did Photoshop gave you a warning stating work in progress or unsaved data will be lost?
Also, which exact version of Photoshop are you using and on which OS?
There are a certain scenarios where a damaged file can be recovered. See https://helpx.adobe.com/photoshop/kb/file-recovery-photoshop.html
Thanks,
Akash