CM LOS ANGELES - Kristen Stewart has a sleep disorder which has disrupted her internal body clock. The ‘Twilight’ actress has undergone acupuncture to help get her night time problems under control as she can’t seem to fall asleep when other people are resting and her random rest pattern leaves her constantly feeling jittery. In an interview with the latest UK issue of ELLE magazine, she explained: ‘’I’m a high frequency person. I wake up here [she points above her head] and then as the day progresses, most people systematically produce less adrenaline so they are ready to sleep but I have this fight or flight thing - I just won’t come down.