I'm 17 year old teenage boy who is experiencing hair fall and hair thinning! What do you think is happening to me?

HELP! I am 17 year old teenage boy who is experiencing hair fall and hair thinning! What do you think is happening to me? I am getting worried because every time I look at my bed I see lots of hair. When I wet my hair, huge amounts of hair removed. I tried looking for answers but none helped me. All I could do was to have theories and intelligent guesses. I know for sure that this is not in the genes because none in our family experienced this. Please help! Is there a cure to this? Need answers!