Is my Facebook being hacked ...?

Hello,

Is it possible for someone to hack into my facebook by using my email address which is my logon to somehow get my password and then go into my facebook as me? i.e. not change the password, just login with my email address and password that they can possibly get? What I mean by getting my password is there is no way anyone can know what it is, but I was wondering if there is software or sites that people can go to and just be able to put in my user ID and it will somehow tell them my password? Thanks.