iPhoto lost?

[skylet]

I had pictures on iPhoto but opened up an older 'iPhoto library' from my time machine to view them. The pictures from the older iPhoto library showed up and now I would like to return to my original iPhoto pictures/library back. Have I royally messed up and lost all my most recent pictures?

 

[Weaselboy]

You should be able to open the Time Machine backup and go back in the timeline to before you did this and restore the iPhoto library.