WotLK Can't Log Into Account

So,came back after a while..around 1 year didn't play...Wanted to log into my main account,didn't want to log into when tried ingame,so i came on site and tried here,once I entered username and password,it said that my password expired and that you sent me new one...problem is that i can't remember/find out which email i used for it...What can we do about it? I know everything about acc,even got pictures of my ingame character...Hope you can help me out..Talk soon,thanks!