Im 14 and believe i have a problem with my hair. Please help me ?

im 14 and im so obsessed with my hai!!!!!! For instance today i was gonna go to my GRANDMA! and i fixed and refixed my hair over 10 times! i straightened it over 5 times and used almost a bottle of hairspray. hundreds of hair were on the floor and many on my hands. i just cant stop messing with them!!! i just wanna rip them out! my hair is sooo much thinnerr than it used to be! i can even see my scalp if i look at some spots: ( im using professional help and vitamins and stuff but still cant . My hair is naturally weak and thin . my dads bald and my brothers 17, with barely having hair to coverhis scalp. I get so jealous when i see my friends with ther thick fine hair. I just cant stop itt !!!!! please help me i dont know what to doo i feel its not letting me enjoy anything anymore. its the only thing thats on my minds. Im grateful that i dont have any other problem but i feel so depressed about my hair : ( please help me