WordPress Admin Access

I wanted to add a splash page to my already established blog, so I changed the root index.php to contain “require(‘../wp-blog-header.php’);”.

Then I created a new folder called blog in my root directory and put in this php file. I then went into the admin panel and accidently changed both the website URL and blog URL to http://www.mywebsite.com/blog and now I can’t get into the wp-login.php.

I am not able to access any of the admin functions nor am I able to see the website properly now. I know I should have done this on a practice domain, but it’s not like I’m losing huge money by having the site down.

Can anybody help me with this please?? Thanks!