Have you ever replayed a conversation from three days ago. Or analyzed a slightly-off text for the fourteenth time. Do you lie in bed running the same scenario on a loop, even though you already know how it ends? If you're AuDHD, this probably isn't rare — it's practically a background hum. It happens to me daily. It's easy to call this "overthinking" and leave it at a personality trait, or worse, a character flaw. But there's a specific, well-studied brain network behind it,