Cant Find Default Iphoto Library AFter a bad mistake

Hello All,

Yesterday I was looking for an old photo and by error i ended up opening an alltogether old iphoto library. Now for the life of my I can't get back to the library I had loaded just prior with all my current photos.

I have 3 hard drives, a local and 2 externals, I can not figure out how to get back to where i was with iphoto prior to that dreadful mistake!

Any help would be extremely appreciated at always,

Many Thanks,

DA