What age do u think is appropriate for a teenager to have hysterectomy?

Im 12 and is having life hard. I plan on not having kids. I want to have hysterectomy as soon as im 18 or whichever age. I see my period and mom does not care of believe me she is in-denial & refuses to buy me pads. What is the current age they use for hysterectomy's? and to remove the estrogen so a woman cannot go into menopause?.What is the age?.