FB messenger, disappearing message (from laptop)
So I read a post that came in on messenger. I planned to respond when I had more time, but i vaguely recall something at the bottom of the post saying that I wouldn't see the message again, but I thought that meant if I deleted it. But now i want to respond, but can't find it. The message was from someone I didn't know, about work issue. Now I feel badly that I didn't respond at the time. Is there a way to find the message? It was sent about 10 days ago, if that matters. (i checked my fb app to see if by chance the message was there, but no luck...) Any suggestions would be appreciated.
Windows, Windows 10