That usually means the database server is down. If that happens, then 99% of the time your database contents are completely safe, but just unreachable at this time. When the database server comes up, you’re almost guaranteed to see your database contents again in the exact state you left them.
Do you still experience this problem? If so, can you please share the FULL database name (including the account username)? I see you have multiple hosting accounts with different database servers, so I don’t know what to check.