Hi , So I'm 15 Years Old Girl My Period

Hi , so I'm 15 years old girl my period last time came to me from 8 months ! So i went to a doctor she told me i have fat on ovaries but I'm not over weight I'm 68 kilo so she told me to lose 5 kilo and eat healthy food for the rest of my life and she wrote to me lutoflone
But I'm really worried to take it that can play on my Hermons so its danger to take it or what should i do bec. I'm really confused . please can somebody tell me the write thing !