I’m wondering if anyone has any experienced ptsd and memories become confused.

A few years ago I had to give a man that had stopped breathing CPR outside my house. I never thought anything of the event but now years later I’m having flash backs of him in different parts of my life. So for example I will see him laid out in my living room in my childhood house or a friends house. This has caused me a lot of distress because I panic thinking I was reasonable for his death and feel terrible guilt. I know deep down there was nothing more I could of done but when I have those flash backs I get genuine fear that I was responsible. I have started medication and counselling but would just help if anyone with ptsd or something similar could share with me their experiences.