I need to redirect the following instances to https://www.mydomain.com;

• mydomain.com
• www.mydomain.com
• http://www.mydomain.com

I have the following in my .htaccess already, but this only redirects mydomain.com to https://www.mydomain.com;

<IfModule mod_rewrite.c>
  RewriteCond %{HTTPS} !=on
  RewriteCond %{HTTP_HOST} !^www\..+$ [NC]
  RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>

Grateful if anyone could perhaps tell me what I need to add. Thank you.