Not remember password of my mail account, alternative mail and..

Hello!!
Sorry for my bad english.
When during my long travel I was in Serbia on 3-th of November of 2013 I changed password of my e-mail of YAHOO (which was my main mail for last 7 years).. I didn't wrote it anywhere and forgot (it was first time happen with me)..
2 days later I try enter to e-mail but can't do it because password was forgotten.

After that sometime from several computers I try to enter to my account and with new combinations of symbols of my password, but i still don't remember it.. Try and try again and again. Not solved.
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Password from my aternative e-mail also i don't know, it is keeped in my main e-mail!!!
And no mobile phone connected with my e-mail.

On about 20-th of November I try use this page https://help.yahoo.com/kb/account but finally there I got question "Your Birthday" which i wrote 7 years ago.. And how i guess in that time i enter not correct birthday (because sometime I joke), so and then service says "Please enter your correct birthday"..
What to do??

In that my yahoo.mail I have a some important informations for me and including passwords from my accounts of some another web-projects. And still can't recover it.
Also there is many my reports from my many travels and many photos.. I dream recover access to my e-mail.

What to do??
Thanks in advance!!