I'm sick over this!

While working on a cataloging project, I had place-holder question marks which I later decided to change to "No Title".

I performed a search and replace, using the "?" (without quotes) as the "search" and typed in "No Title" (without quotes) and ran the process. As it was running, it appeared to do EXACTLY what I intended for it to do. Suddenly, it kind of crashed. The background of the spreadsheet disappeared, and I could see through to my desktop and all of the other information changed to "No Title", I could still see the rows and columns over an invisible background.

Is there any way that I can find, restore, the file to the previous state? I am so angry that I did not make a backup file.

Any ideas?? Please??

Thanks,
L.