[ This is a first for SnipeMe. I have no experience with something like this, so I asked for someone who does to write a response. The following response was written by my wife. ]
I have been through 2 similar situations. I have had a knife to my throat and a gun to my head. Both happened in my own home (when I was living at home with my parents). They both happened in my final year of university and they changed my life. Up until that point, I had never been afraid to stay at home alone or drive anywhere by myself. The funny thing is that both occurred during daylight hours and yet I am much more afraid of the dark. All of this happened to me about 12 years ago.
My mom and I did go once for a counselling session and I wish that I had pursued that avenue. I think talking about it could have helped me. I suffered terribly from post traumatic stress disorder and to this day a few things can bring back bad memories.
The only advice I have is for you to find a support group, especially of people who have been through similar experiences.