WP setting pointing to wrong URL

I was having issues with my domain not showing up as a blog site after I went through all the settings. I thought I needed to point to a different domain because there was a pre-loaded squeeze page on the one I set up. So, I changed the domain setting to a newly registered domain and then briefly lost my internet connection. WP saved the one change I made and now I can’t get to my original domain WP site because it takes me to the newly registered site page on the internet because the site isn’t propogated. How do I get back to my first domain WP?