I am so sorry to hear how your daughter is suffering and how that is affecting your health. You may want to talk to someone who has had some experience of what you have been going through.
I work for a charity called The Icarus Trust that was set up to support families and friends of addicts and they will be able to help you. We have experienced and trained volunteers called Family Friends who you could talk to if you wanted to. It is a free service. You can contact us on help@icarustrust.org or visit the website http://www.icarustrust.org
I hope that you will be able to get some help and support and good luck with your counselling.