D.K.
I had the same situation when my 14 yr old was younger she would come out & do stuff all while she was asleep. It does sound like she might be stressing heself out with what is going on in her life. I bought my daughter a dreamcatcher & told her it would take all the stress away (kinda like a mind thing) it helped some but she still does it like when she is having a big test come up or something is really bothering her. Hopefully finding something that she thinks will help will work. Do becareful with having locks she can't reach just becasue depending on her dream or stress she could go out the doors & not know it. (I had a friend in school yrs ago that was a sleep walker but she would go outside & wander) scary.. I also have both my girls go in to bed 15 min before actual sleep time & just lay & relax maybe read a book gives their minds time to slow down this might help too.. good luck