I Blame Myself For All That My Child Has To Go Through.

I feel hurt, guilt, frustraition, all the time. I blame myself for all the challenges my daughter goes through.  She is adopted, had her since birth. She is a drug baby. A lot of her challenges stem from that.  I raised her, so I take blame for her behavior. I take blame for all she has to go through.  I am blaming myself for her birth mother using drugs while in utero. I feel like I did something wrong and now I am trying to figure out where I messed up.  Its hard. I have lost focus.  I don't like who I have become. My confidence is gone. I dont know what to do.