Email Facebook support and support all of your accounts information to ask help. Or try to change your passwords with your creation email.
Facebook does have a fairly in depth section on their site about account security and account hacking. I'd highly recommend you give it a look. facebook.com/help/security
hi, you can change your password of facebook it is easy just click forget password and a mail will come to you for that and than change it.
If you have entered your mobile number in your face book account then easily you can recover your password