I will start from the beginning for you and maybe that will help.... Thirty years ago I witnessed a family member attacking another family member, I was only a young child then though. This is not something I have ever thought about over the years, or if I ever did think about it, it didn't concern me. Then in Augustthis year, literally over night, I lost all my ability to feel any emotions. What I mean by this is I can't feel love towards any member of my family, when my young children cry, whereas in the past I would feel their hurt, I don't feel anything anymore, I feel like as if something terrible could happen to someone and it just wouldn't effect me at all. Like you say, I just can't feel empathy either. I have seen several doctors and even paid to see a psychiatrist, but they all keep diagnosing depression and anxiety, and won't agree that it's PTSD, only I feel 99% sure it is PTSD as I can't find any other illness which would literally switch my emotions off over night.