If you really need all your site work through your SSL certificate (you must have a certificate installed already), add the following lines in your .htaccess file in your public_html directory, if the .htaccess file is not there, create it:
RewriteEngine On
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^(.*) https://yourdomain.com/$1 [L,R]
Replace "yourdomain.com" with your real domain name.