Log in error

Hello,

Having a, what seems to me – Major issue.

When I log in, it says “ERROR: Invalid username. Lost your password?”
Which is odd, as I have not changed my password or username. I know for certain it is correct, as I have my documentation saved. Anywho,
so I click ‘lost password’ enter my email and the following ‘ERROR:
There is no user registered with that email address.’ displays. Which
again is odd.

I have an email from wordpress in my inbox from when I started my
website, therefore I know it is the registered email.

Email reads:
“Your new WordPress site has been successfully set up at:

http://avanderley.com

You can log in to the administrator account with the following
information:

Username: admin
Password: The password you chose during the install.

We hope you enjoy your new site. Thanks!

Does anyone know how to resolve this issue?