Has everything disappeared?

I recently logged back into my account after a month or two of inactivity, and it appears that everything has changed!
I know this was the email I used, but now my name is "Gegldef" and it says I haven't made any posts. I made a post and some replies back in July/August, and my name (Red Reddington) has completely disappeared.
What is this?
Thank you,
(Previously) Red Reddington


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