moving to new shared hosting server

I currently have my multisite network setup on a shared hosting account. I'm moving to a new shared hosting account. When I try to navigate to the domain, I get a redirect loop. The browser is trying to go to mydomain.com/wp-signup.php?new=mydomain.com. I am able to navigate to any of the subdomain.mydomain.com sites easily. I've been searching all over and I'm unable to come up with the answer!