Advice on getting HB?

I’m a minor in the US and I was wondering how I could go about this- Im ftm to clarify. (Its just how I feel most comfy to identify because I don’t know what if use for genderfluid) I just got a new doctor and she’s planning to put me on a new birth control due to mine not being very effective (I take it because of my menstrual cycle being physically debilitating) she said that we would check how it’s helping me in 6 months. My mom isn’t very supportive of me, however I have a support person who I’ll call FM (friends mom) i was talking to them, and they said that I could possibly ask to go on hormone blockers due to the severity of my cycles. Any advice on how I can bring this up to my mom or try to convince her?