Your privacy is required by HIPPA law, so there really shouldn't be any reason not to say something.
I'm curious why you are having a problem finding a doctor that would be willing to help you. What particular issue are you seeing them for? If you are having hip problems due to bone problems, then your HRT may be a factor in your diagnosis.
Regardless though, your health care professional should be aware of all meds you are on so they can make a proper diagnosis.
-Sandy