(((((((((Wisewoman)))))))))))
My heart sank when I read your post. I'm very sorry you've lost your daughter.
Your adopted daughter is 18-teenage years are very hard on parents. I gave my parents one heck of a time. (ran away from home 3 times)
Try not to take it too personally-it sounds like she's going through a lot herself. She'll realize one day that you've been there for her.
I hope you find comfort in knowing that you are very much loved by both of them.
I'm sending you positive and nuturing energy...