Sleepwalking is Very common among us ADDer's. I would sleepwalk when I was a kid, up until around age 14 or so. I was afraid of the dark too. I also would talk in my sleep and until my diagnosis I would awake in a semi-conscious state and not be able to stop eating something from the pantry. Many ADDers have really poor quality of sleep.
This can improve greatly after you find the right meds. I sleep like a baby these days