Checking if you have an account
To determine if you have a Google Account, just enter your email address on the password-assistance page.
If there's no Google Account associated with your email address, you'll get a message that says 'No account found with that email address' you entered. To create a new account, visit the Account Creation page.
If you have a Google Account, you can reset your password on the password-assistance page by selecting "I don't know my password" and following the instructions.