Hi Amber-
You’re right that you should be able to log in with either the username or email address. BoldGrid may develop the software that runs your site, but we don’t have any access to your site itself to see the usernames or reset the password.
I recommend checking out these five ways to reset your WordPress password or reaching out to your hosting provider for more assistance.
From what I can tell by your website’s DNS, your hosting provider is a firm called Digitonics.