Ugh! Photoshop help please!

I have a psd file that I use as a mastersheet for the comic I'm making. It has everyone's skin tones, tony's shiny arc reactor and the comic panel frames all on different layes.

A couple of days ago I fat-fingered something and the file disappeared. I can still access it in photoshop, and 'open' it, except it doesn't show up. I can see it in the little history/actions window in the top right corner, but I can't get it to open on the actual page. *pulls out hair*

Any thoughts? I REALLY don't want to have to start some of this shit from scratch.

thanks in advance

edit: Okay, I fixed the problem by opening it in a different ps (elements), changing the file slightly, then saving it under a different name. But I am still interested to hear wtf I did, and how it could be fixed. I'm using psCS3 btw.

MOAR edit: fixed now and I am embarassed at how stoopid I am. Thanks Mierrona! <3

Regarding Tony Comic Part 65

Work safe today.
( Under the cut! )

Find the whole thing On A03
or On livejournal