Our domain registrar is Hover. I updated the nameservers on Hover to the two Cloudflare servers listed for our domain in our Cloudflare account on Wednesday. Today is Saturday and Cloudflare still does not confirm the change and DNS propagation has been really spotty.
I have a pending support case open with Hover, but it is pretty straightforward to update the name servers. Everything looks fine in our Hover account. I’ve clicked the nameserver check button on our Cloudflare dashboard a couple times a day since Wednesday but still no confirmation from them.