Hey everyone, it's been a few years, but I am back. It took from 16 years old to 22 to fully understand what is going on.
I was previously diagnosed with bipolar disorder..I can see how this makes sense from their point of view, but it doesn't answer a lot of questions about the amnesia, recurring flashbacks, and how different a psychotic hallucination vs a dissociated part..
This was largely because I never picked up on the amnesia, which I consider to be the most telling and unique symptom of DID..Amnesia is unique to DID, and serves as a valuable indicator. For example, I realized I had it after recognizing a pattern of "blacking out" after learning of bad news (ie a death, fight, domestic issue), but this was very difficult to detect, as I would completely block out the situation!
Anyways, my answer is 8 years.