Of course I don't know any of the details of what you've been through, but sometimes I find it helpful to consider that all memories have a component of "truth" or "reality" in them, and that they are all also flavored by the perspectives and experiences that we bring to is. Have you ever watched a movie or read a book with a friend, and then compared impressions afterwards, and noticed how you each remember details differently? Same thing within our own minds, and the stronger the emotional impact (trauma), the more stuff gets "attached" to the memory. So, maybe it can be useful to consider that your flashback memory contains an important truth about your experience, whether the details of events are exactly factual or not. Talking it through with a good therapist who is knowledgeable about trauma & PTSD can help you decide what this flashback means to you and how you want to move forward and heal.