Photoshop file got completely changed to another I had open
I was working on a file (file a) but needed to get the font I used in a previous file (file b), so I opened the PSD for a previous piece, clicked on the layer with the text, and noted the font I used. However, when I went back to the other file (file a), all the layers and work was just a copy of the previous file (file b). I closed it and opened it back up, but file a is still a copy of file b. A lot of hard work was lost, and this only happened a few minutes ago.
Is there any way to restore file a to its original state? I tried the history icon but it didn't work.
