I answered a question (on the non-meta ELU site) about the term "native speaker," after several other answers had been posted. Immediately everything is gone. Was the question deleted? Is my inability to find the question (and my answer) supposed to be my only clue to what happened? Why was it deleted (or whatever)?
The question wasn't asked on EL&U, it was asked on ELL, and you answered there:
It is not deleted. You didn't see it because you were simply looking on the wrong site.
A useful tool to know about is your Network Profile, which can be used to find a timeline of all your activity across all sites on StackExchange.
You can find your network profile by clicking on your own username, then Network Profile in the top right near your gravitar.
Your activity timeline is the 4th tab on that page. It's worth bookmarking.
Your most recent ELU answer, deleted or otherwise, is this one from the Ides of March.
There is no record of anything newer than that.