Most commonly, this happens because your SSL/TLS Mode is set to “Flexible”, where Cloudflare is sending requests to your origin in http (unencrypted) and your origin is trying to force it to HTTPS, and this just ends in an endless loop. You can change that under SSL/TLS → Overview. Here’s a magic link to get there: https://dash.cloudflare.com/?to=/:account/:zone/ssl-tls
For other common causes, see:
It looks like you reverted your DNS back though, as it looks like from my end leeocarroll.com is using the default nameservers for IONOS Domains. You’ll need to set the nameservers back to Cloudflare for any of your changes to take effect.