(((safe hug)))
As soon as you can get to a counselor and do discuss the personal details. The sooner you do this, the less impact the trauma will have on your life... honest!!!
I'm not sure you "have" PTSD but could be. Having such reactions to any trauma is normal though...hopefully it hasn't developed into a disorde
If you can't talk about it, until you find a T, then write about it. The going over and over of it helps, also to try and look at what you write... try to view it as though say, a friend had written it, what might you tell that person? It isn't happening now. You did the best you could. I'm glad you survived. Because it happened doesn't mean it will again. You know more about how to protect yourself now. Things like that maybe?
Being hypervigilant is a usual reaction. With each reaction, tell yourself for example, Oh ok that person is just walking by me, a little closer than I want. Or, it's because of the trauma that I'm feeling this way, but I really am safe right now. Keep processing the trauma as best you can.