As adviced by popowich in previous reply you must recover your password, whenever forgot it try to recover with recovery question. If you feorget all than make support ticket to gmail admin, they can find issue to your problem.
Many Lucks to you.
Hello folks
I'm wanna know if I can change my gmail idendity, since too much people know it. Si if I can please change the login to another one without losing my contacts and data inside. Thanks