Closed PDF with Notes, annotations without saving.. Can recover??

[hazedragon45]

I did a lot of annotations on a really long PDF file... accidentally closed it without saving... stupid slip of finger... i'm guessing it's impossible to recover??????? Btw it was on preview

 

[John Doe 57]

Yeah, unless it was saved, I'm pretty sure its gone.

Found these:
https://forums.macrumors.com/threads/434645/
https://forums.macrumors.com/threads/550523/