You have tried hitting esc and cmd-., I assume?
Unlikely, but still: can you raise the Preferemces dialog by hitting cmd-K?
Yes. Hitting esc and cmd just want to close the whole program which doesn't allow me to save my edits. and Can't raise the preferences box or any other box in any manner at all. Thanks for the suggestions though. You are the only one who tried to help.
Which version of Photoshop do you use and if CS6 and higher do you have »Automatically Save Recovery Information Every …« checked?
If so there is a chance that Photoshop created a back-up file on your scratch disk.