Your daughter is making decisions about how she wants to present to the world, but it is sometimes hard to know when to help and when to act with caution. Please talk with your pediatrician about your concerns. Medical advice may resolve your concerns.
If you are uncertain whether your physician is accepting of LGBTQ, there are resources to help locate providers. Check out:
The Healthcare Equality Index at https://www.hrc.org/HEI
Transgender Care listing at http://transcaresite.org/
The provider listing at http://www.glma.org/index.cfm?fuseaction=Page.ViewPage&PageID=939
Helpful resources for other information include:
https://www.kidsinthehouse.com/search/site/transgender
https://www.genderspectrum.org
https://pflag.org/search?keys=transgender&type=resource