dont worry about this... try your to access your account with old pasword then if it not open then try for PASSWORD FORGOTTEN option then if you have enter the answer of security question or any alternative email from that you can simply get password back.. and after that i suggest start new account and use it carefully....
if you can change your account then thrw that one and start new one otherwise if anything related to that account then simply go for security answer and alternet email address method.... All the best....