Could you maybe fall asleep to relaxation music? Have a favorite item that is comforting? (blanket, body pillow etc.) Make sure your bedroom is on the cool side, and dark. Try lavender oils on your pillow.
I know its the thoughts of past abuse that you cant distract yourself from, and I'm sorry all I can suggest is meditation, a very strict ritual before bed, no triggering tv shows, and possible need for temporary medication. I've never asked any of my therapists ways to cope with that... I tend to just let myself fantasize into another reality....hope you get some more advice, hugs to you