(((((Barb)))))
I don't have a lot to add but a hearty +1 to what Trek said. I'm so sorry that things turned out so badly for your family, and so grateful to you for taking your children in.
When you say you've tried "everything," have you tried EMDR? It's one of the modalities that's supposed to be very effective on the kind of post-traumatic reaction you're describing. "Therapy" is as broad a term as "medicine" - it encompasses a lot of modalities and specialties, and I would really encourage you to try again. I do know how difficult that is in a rural area, but I would think you could find a broad range within a reasonable drive, and that at this point a drive would be worth it.
I hope you find a way to soothe your heart, and sooner than later.