Changed http to https accidently and now the website and admin panel is gone

[KangJL]

This should help.
Read carefully

How to make Cloudflare Flexible SSL work with WordPress

WordPress is a great and very popular website building tool, and Cloudflare is a great way to get HTTPS on your website for free. Thanks to Cloudflare’s Flexible SSL system, you don’t even need to manage SSL certificates to use it! However, getting WordPress to show a padlock and make all pages work can be a bit tricky. This article explains a good way to configure your website correctly with Cloudflare Flexible SSL. Heads up! Instead of making WordPress work with Flexible SSL, you can also c…