night terrors and exhausting dreams

I have severe depression which is co-morbid with mild BPD and between these two, I don't really get great sleep quality. usually I will wake up screaming and thrashing and not aware of it until minutes later or on nights when they are really bad I actually run out of bed and have had to go to the ER because I ran and fell down some stairs in my sleep (still screaming, mind you). I'm usually not aware of this happening. I also have really exhausting dreams and sleep patterns since depression messes with your REM sleep cycle, so I wake up even more tired than I went to bed. Nights where I have long dreams are the worst. I wake up feeling really drained and depressed and sometimes I just cry and cry. I've been falling asleep at work too because of this even though I get about 8 or 9 hours of "sleep". My therapist says there is nothing she can prescribe me because it won't solve the issue, only mask the symptoms. I don't know what to do. My entire life feels like one huge battle.