I'm not a proffesional, but It sounds to me like you indeed do have psychopathy, Im basing that on the fact you say you have no conscience, guilt, shame or fear. They're all common traits of psychopaths.
From what I had heard of psychopaths before I visited this site I was told exactly "Dont bother; they're evil incarnate" So as you can imagine I came here with a certain level of arrogance but I soon learned that there was nothing evil about them, nothing "Abnormal" and certainly nothing to be afraid of. So being psychopathic doesn't mean you have to be a bad person, and it certainly doesn't mean you have to hurt anybody.
Question - Do you ever worry about being psychopathic?