Does this ever happen to anybody else?
Maybe you're having dinner with friends or reminiscing with someone older than you. Someone says something that triggers a memory, and it's a funny story, so you open your mouth and begin to talk and suddenly realized... That it never happened. And you quickly close your mouth before anyone notices.
The "memory" was an incident you invented for some character.
This happens to me all the time. And backstory is particularly haunting. I have lots of friends that are older than me, and some younger, but it seems that I never pass these off as "that happened to me" but more as "that reminds me of something that happened to a friend." I've already been caught in the middle of one of these stories before I realize my story is untrue, but I never admit that... I just keep talking.
I guess it's a testament to the fact that my story might have happened and that someone in the world, as another friend likes to say, my characters exist.
The series I am marketing "takes place" in August 2002 through November 2003. But today, my main characters are in their early 50s. Making them older than me by a good 15 years. And their memories can be as vivid and real as my own. Which is scary. When I honestly get them mixed up.