My Daughter had this issue it presented exactly as the film portraits. Medics could not find an answer they came up with all sorts she was put into a Mental Hospital for over 2 month dosed up to much with the wrong medication.
Eventually there was a Consultant doctor at Birmingham Doctor Baggarie (Not sure of the spelling) he took her under his wing on the first consultation we were in his office for approximately 5Hrs.
All is well with Lu now.