hair loss(alopecia ) due to dht

hi i am 18 years old boy from india. i am expericing hair loss at very high rate nearly 30-40 hair from my head.i am expericing this from past 9 months now i am nearly bald at crown and almost all hair is also lost and hairline has also started reciding.i am also expericing hair loss from eyebrows,chest,pubic hair also. i masturburate 4-5 times in a week. there is no problem of hairloss in my family .my father and grandfather are having there full hair.there is no herditery problem. i am not having any other serious health problem. i nearly sleep for 8 hrs daily.i drink about 1.5-2 litres of water daily.i tried out numerous shampoos and oil.i even ate pumpkin seeds for blocking dht.but nothing happened.plz help me to stop hair fall and grow new hair as i dont want to become bald.