Document lost / Pages for iPad

Hello,

I have created a file on Pages for iPad (iOS 7.1) yesterday. The app was not allowed to backup documents on iCloud. It was saved automatically and then being imported as PDF and sent as mail. Now I can not see the doc in Pages overview anymore even though I have definitely not deleted it. Is there any way I can restore this file again?

Is there also a possibility to import a PDF made with Pages back into Pages in an editable format?

Thank you for your help in advance!