if you want to know if you have benn hack on a password is out there in the world by going to this website and tell them your e-mail address https://shouldichangemypassword.com/
please tell me if you thing this site works in the comments
But If you Think You Been Hack At nytime you should change all password for anything you use the same password quick as you can.
or do as i do and use a service like lastpass like i do and change your password ever few moths