Since I got Dissociative Identity Disorder and PTSD, the flashback i look for this to be the constant memory carrier for moments to make a little sense to tell a succinct story. For us, they like absorbed things so other areas are able to carrier oon, putting things together. Some in the third person some on as other experiences.

For anxiety suffers the busyness of the mind constant worry is usually what gives a flashback its credence. I have more on my mind it watches in third person, they will beleive everything you say about it. Sharing it would be a good idea, it normalizes what you are dealing with to get a diagnoses.