Welcome from another mom.
My opinion based on my exper. - 28 day program is NOT enough expecially since your daughter is so young. Stopping the drug temporarily is just that but recovery takes a lot of time + work. It is usually best if they go from primary treatment into sober living house where they get drug tested and the rules are enforced by someone other than mom. Surely your boundary is sober to live at home. Tho your AD will lie until caught if she is using. Most cases that lead to recovery involve more than one time at a rehab. and a few yrs. of addiction. I hate to sound so negative but I am just telling you what I know based on my own son and the many parents I've met in my parents an-anon group along w/ what you share abt. your AD.
Learn all you can about addiction and stay focused on your own recovery bec being the parent of an addict takes "work' to help you get through this.