First - not sure version of WP using.
Site has been working strong for years and I know was up and going 3 days ago (my last update to the site) but today, users notify me of "URL not found/404 error" , or "link broken". For the life of me I can't figure out why and since I can't access our site even as admin, .... yikes! Where did it go, what might be wrong, and how do i recover it?