Coping with the Psychopath/Narcissist Child

My daughter is 18, pregnant, living in the basement of her boyfriend's mom's house. (just a note, I had talked to her numerous times about unprotected sex she was taken to the doctor and was supposedly on birth control but just didn't use it) As bad as this sounds, it is nothing compared to how she has treated her father and me in the past several years. I realize that some of her behavior is somewhat typical for a teenager, such as cussing us, lying to us, and disrespecting us, but what hurts us so much and bothers us so badly is the lack of remorse she has for anything. She has never shed a tear, never told anyone for any reason that she is sorry. She seems to have no concept of right and wrong and looking back she never really has. She has threatened suicide numerous times in the past few years and because of her lack of fear and concern, we have taken the threats seriously which has absolutely terrified us. She has used us for what she could get out of us and as soon as we decided we were giving no more and as soon as she turned 18 she was pregnant and out of here. She does still call us when she needs our help with something or wants to torture us some more. Her father still answers her calls but I won't let myself anymore, it just hurts to bad. She has punched holes in our walls, fought us, stashed liquor in her room numerous times, come home so drunk she almost died from alcohol poisoning, used drugs, sex with every guy she has dated, stayed out all night with boys, ran away several times, the list goes on and on. And as I said before, I know that some or all of these things are "typical" teen (not that that makes it ok) but she never understands that she's done anything wrong and ALWAYS twists everything around to put the blame on us, her parents. She doesn't understand there are consequences for her actions. I have tried so many times to make her understand all the pain she has caused us when all we've ever done is love her and as I've read on this website she takes my words and uses them against me, calling me a weak person and telling me I need help mentally. She has had friends through the years but has one by one went crazy on every one for one reason or another until she has noone or least noone for very long. Her boyfriend, who she has been with on and off for the past couple years, seems to submissive to her. She has beat him up several times almost killing him once by hitting him in the head with a glass bottle filled with sand. I could write a book on all the pain and suffering she has caused mostly us but others too. I will stop here for now. I hope I haven't left anything of importance out and haven't said to much to bore you. After researching and reading, I have decided that she has to have a mental problem. A lot of the stories I have read on this website sounds identical to my story. I know it is to late for us to help her even if we could but it sure does help knowing that I am not alone. I thought I was the only person in the world that had raised such an"evil" child. I have questioned everything her father and I have ever done in raising her and have even questioned whether or not we are fit to raise our son, thinking that he might turn out the same way.