Yes. It’s absolutely normal. Something happened that has caused you to significantly change the way you look at the world and your place in it. Basic assumptions you’ve made about your family and your safety have been challenged in a big way. The replays are your mind’s effort to make sense of what happened. Apparently, your parents came through for you which, I imagine, is very reassuring. None the less, you are struggling with a loss of innocence and trust that is very, very hard to handle.
Because something is “normal” doesn’t mean that you don’t need some help. A therapist can provide you with tools for metabolizing the experience and for learning from it. I hope you will consider seeing a mental health professional who specializes in trauma and teens. I think you will find it validating and useful.
I wish you well.