Can't access Yahoo mail work account, please help !

Hello, the account i use for work and study at university says wrong password , when i try to sing in. It started after i clicked the remember password button on chrome. Then i singed out for entering another account , then when i try to sing back in to work account , it says wrong password. Please help me , i have all my work and study documents send on that account mails ( ***@*** ) , i tryed to recover account with the security questions , but it says it was updated in 5 october 2009 , and i dint do that ! Please help me , and if you can send me info or password reset on my other account : ***@***
Thank you !