I want to know if i have become a sociopath.?

when i was 8 i witnessed a baby a young girl and there mother get struck and killed by a car. The baby and young girl both died at the scene the mother survived but suffered a compound fracture in her leg i watched her dragging herself across the pavement screaming for her children. i stood in shock staring at the sceni dont know what i felt. 2 years later my grandfather died in front of me, i was very sad. i remember crying. years later my cousin to whom i was very fond of and lived with us was decapitated in front of me while riding a gokart. in what i guess was shock i picked up her head and tried to put her back together. after that and since that i have been kind of numb my father died in my arms approx 1 year ago he had congestive heart failure and died at 56 he died choking on flem cause he was too weak to clear his throat after a breathing treatment the nurses had gave him. i didnt even blink i was not at all bothered by the look of shock on his lifeless face i was unmoved.he was always there my parents never divorced i knew him well and im sure i loved him. but nothing... Now i am 24 years old i have a wife and together we have a 4 year old son and a now 3 week old daughter. i dont know how i would take losing them i want to believe it would devistate me but i cant have a part of me that believes i would almost be relieved because then i wouldnt have them to worry about. I dont really get angry anymore nor happy or sad ust numb i pretend emotions ust to fit in. but i dont know why i even care to fit i do though. I do have ptsd but this isnt what ptsd does to a man is it please someone explain what is wrong with me and what do i do.