If you are talking about your Apple ID password, make sure it IS your apple ID.
In the past 24 hours, I have received two emails "How to reset your Apple ID password". I had not requested any change and I finally realized someone else is trying to reset the password. I have had this Apple ID since 2009 so I am not using someone else's ID.
Again, if you are not receiving the email to reset make sure you have the right ID - it might be going to the email linked to the account, and it might not be yours.