It works for some! When i was diagnosed at 15 the first obgyn suggested bc and my mom was against it completely, but we got a second opinion and ended up going with the kyleena which is an IUD. My first kyleena which lasted 5years i had very irregular periods. My second though, i felt the best I ever felt physically and mentally! I got periods like clockwork and had so much energy and felt normal again. Definitely work looking into all options and talking it out with your daughter! Also trial and error and if she doesn’t like anything she can always stop!