Tell her you are NOT taking the pills she bought! Self-medicating is dangerous!
Besides, what do you want? It sounds to me that she's making you do this for her benefit, but what about yours? What are you getting out of this? Do you even want any of this? It sounds to me like you don't, and I apologize if I'm just making assumptions. But taking hormones of any kind causes big changes to your body, and if you aren't comfortable having them, it would cause major distress.
I guess I shouldn't jump the gun and assume she bought hormones, they could be just supplements, but in either case, you HAVE to think this through. Don't let her make you do anything you don't, because she sounds very manipulative.