the age where women's bodies decide to majorly change things up. She might be reacting to something now that has never affected her before. Within the last year or so a milkshake before bed will now give me crazy dreams. Writing down what she ate and approximate times might help her recognize a pattern that corresponds to her night terrors.

Another suggestion, is to have her write down the dream and then write what about it tells her it's not real. For example, say there's a regular unlocked door that she can't open no matter how hard she tries, she'd think of the reasons why that might be (in the context of the dream). Maybe it was a lead door, maybe the hinges were welded shut, maybe she was pushing and should have been pulling, etc... As she practices that kind of logical reasoning while conscious, she'll get better at it and hopefully that skill will start to seep into her dreams so they don't seem so horrible