Important help regarding emails.

I don't know the current password to my main email account. I have it linked to my gmail account and anytime i click send password reset request to the gmail, the email never shows up on my gmail account. So the other day I went to submit a form (the questionnaire) and I filled out my details really badly(I was young)so I don't know most of the details. I still know one of the possibilities of the secret question answer and I know most of the old passwords. Any help to get that email is much appreciated.