It's nothing to do with anxiety disorder, when your mind runs like a motor and is constantly racing with no way to turn off it can obviously make it extremely hard to sleep. My mind wandering iff to thinking about how I would win a chess match against a black bear while I'm trying to sleep is 100% my ADHD and 0% anxiety disorder lol. And thinking about random embarrassing shit at night also isn't an anxiety disorder, it's just your ADHD