Hey, i'm 17 years old and my hair is thinning. Each time i shower there must be about 10 strands of hair that falls out. I've seen the doctor and i've had a blood test, and im 100% fine. I'm not stressing or washing my hair frequently. My brother and sister has thick hair. I'm the only one with thin hair.(With my father)

I've been thinking that i should try rogaine. The question is.. am i too young to use rogaine? I've asked my mother if i should try rogaine, but she oppose that idea.. " I'm too young" Should i go ahead and buy rogaine and try it out secretly?

I notice that I'm begining to see my scalp in different areas. I want to stop the thinning before it too late..
please replay