Linda, I had to come to the same conclusion with Rob. I was mentally, emotionally and physically exhausted. I could do no more. There was more drama for him to face but it was drama because of his decisions and nothing I could do anything about anyway. He was an "adult" in the eyes of the law, even if he was far from that realistically. It broke my heart and ultimately broke my marriage.
My heart aches for you. I remember how horrendous it was to get to the point I had to come to in order to save my own sanity and health. The social worker who opened the file should be hung by whatever body part would produce the most pain. Very gentle hugs to you.
Suz