Hi, Amanda –
Is your blog hosted at wordpress.com? If so, this document might be of help:
https://en.support.wordpress.com/domains/change-name-servers/
You may have better luck posting at the WordPress.com forums as opposed the forums at WP.org; the WP.org forums are for those experiencing issues with self-hosted (not WP.com) blogs.
If you own a domain name and are wondering how to change its nameservers to get it to point to your hosting account, that procedure is different depending on where you registered the domain. Try consulting someone associated with the registrar; often, there will be a live chat into which you can enter, or a toll-free telephone number you can call to get help.
Good luck!