(((obsessed))) My kid was an active meth addict - from ages 12 or 13 until she was 18. She has been clean for 2 years.
The only thing that helped me was Alanon...lots and lots and lots and LOTS of Alanon meetings. Normies, like your husband, really don't understand... all they know is that the person THEY love (you) has gone bonkers.
Maybe your husband will try some meetings with you? It may not be his daughter, but you are his wife, and her drug use affects him ... through you.
I wish you the best. ((hugs))