Get email address from old account I need to delete asap

Hi. I ned help asap.
I need to find email address of my old old account on facebook, it has some private details that come up in google seach that I need to get rid of asap.
Can anyone help me? I can't seem to log in, don't know the email, but I know there are sites that can scan the page and get the email? I tried one but it did not work? Any other easir way to do this?