Hello and thank you for using this service,
Gmail is a free mail service. As such, support is limited. Have you gone to mail.google.com and clicked on the "can't access my account" link? From there, it will ask you questions in order to get your password XXXXX Understand that ANY email password XXXXX will require that you have the right answers to the personal questions you setup (for security reasons).
Also, I would recommend you check further into these emails. Based on your message, I'm assuming you do NOT currently have access to you account , because changing the password XXXXX that case would be simply and easy. In any case, it's possible someone could be spoofing your email address and not exactly sending from your gmail account. You can see this by looking at the email headers on one of the dubious emails.