Welcome,
I feel for you. I was a teenage heroin addict and used for almost 30 yrs. I completely agree w/10356 and Atthebeach. Withdrawal will not kill your daughter and enabling is not the solution. It's one of the problems. Your daughter is at risk of arrest, destructive relationships, criminal behavior and, if she's IVing or moves to IV use: Hep B/C/D, AIDS, Endocarditis, Pneumonia, abcesses, etc. Definitely get to an Al Anon meeting in your area.