How can I rejoin a secret facebook group that I created and was the sole administrator for?

[David]

I somehow no longer am in a facebook group that I created and am the sole administrator for. I don't know how this happened. I asked friends if the group still existed because I somehow can't find it anymore and they said it does and they are in it but it doesn't show me in it anymore, which means there is no administrator. If there was an administrator, I know that the administrator would be able to get me in somehow but there isn't. Is there any way I can rejoin the group?? There's no one that is able to change the settings to open because only an administrator can do that...