Help!! I Can’t Access My WordPress Application

I changed my WordPress database password on GoDaddy. When I tried to access my WordPress Admin application I got “Error establishing a database connection”. So I changed the password back to the original but still get the message. Also, when I now try to access my WordPress application (non-admin) I get “The website cannot display the page”

I’ve checked my wp-config.php file and the password matches the DB password. I’ve even retyped my DB password in wp-config.php. I am able to FTP with the DB password. The user id has not changed.