iPhoto deleted facebook albums also deleted iPhoto albums.

I hope someone can help me out.

I started up iPhoto after deleting a lot of pictures from Facebook. It stated something like do you want to import the pictures from facebook albums? I was like no because they are already on my iMac but not it seems they are gone.

Is there any way to fix this? I have a time machine back-up but it happened about a month ago.

Thank you in advance.