Whoa!.. Why did you delete the wp-content folder? That's directory has all of your uploads, theme. Your database is in on the database server and not in the wp-content folder.
If I were you I would contact bluehost immediately and see if they can rollback your site to an earlier version.
Once they've done that, try to upgrade again, but don't delete anything. Instead use a plugin like wp-db-backup to back up your database and then just click the upgrade button.
Backwpup plugin is also very good, because you can back up your db and the whole WordPress site and content.