Waking up crying at night

My sister is 5 years old and she is a normal girl. At night when she sleeps after reciting 3 qul's and aitalkursi she wakes up at 2 am and starts crying and she is repeatedly saying allah hu akbar bismillah al rahman al rahim and after 10 to 15 minutes she gets normal again and goes back to sleep being exhausted and once she gets up she don't remember what all happend. This is happening with her from past one month.