DNS/Nameserver problem

I installed WordPress and I could access it just fine and started writing posts. After changing the nameservers my website was not showing up even 48hrs later.

I went into the WordPress settings and noticed that the two sections that are called something like ‘WordPress Domain’ and ‘Website URL’ were listed as my IP address, so I changed them to my domain that I was trying to map to (dancer.ly).

WordPress immediately crashed and went to a ‘Server not Found’ page. And that’s now what displays on my domain and my WordPress login page, so I can’t log back in to fix anything.

I posted this problem a couple of days ago and someone suggested installing myphpadmin and changing the URL directly through that. The install seemed to work, but entering ‘http://127.1.0.1/myphpadmin’ brings up a ‘Not Found’ page.

My login page now looks like this now:
My domain hosting is through Register.ly and this is how I changed the nameservers:

Any ideas? Do I need to be able to access php or is there another way? Is it possible that php was not installed correctly? Thanks!