6 year old sleep walking

My daughter has sleep walked and talked in her sleep since she was 2 she is now 6, she gets stuck and zones out a lot during the day that have to call her or clap my hands to snap her out of it, this last 2 nights have got me worried, on tues she screamed at night I ran to get her and she seemed lost and still asleep, on wed I woke her to use the restroom since she fell asleep on the sofa she walked around seemed like she was asleep when I turned the light on she screamed horribly is this normal