I followed the instructions of https://wiki.civicrm.org/confluence/display/CRMDOC/Upgrading+CiviCRM+for+Wordpress#UpgradingCiviCRMforWordPress-2.BackupyourCiviCRMdatabaseandsettingsfile/s but crucially missed the line "Refer to the MySQL reference manual or the phpMyAdmin documentation if you need information on backing up your database. Note that not all versions of mysql or phpmyadmin export triggers or stored procedures by default.".
The upgrade went well and completed, but now my database is empty. Have I lost my database? If so, can I simply ask the website host to restore a backup to recover the last-saved data?