Squirrely1
Glad everything worked out.
Remember to use the Auto save/backup options in Preferences - they may save your project if this happens again, but I still recommend saving often anyway.
I press save before every preview, and when I'm finished for the day, I save a dated .capx in a backup folder.
After working in I.T. for over 15 years, I know the benefits of taking control of a situation and not relying on anyone or anything but yourself. I have NEVER lost any work :)