Masturbation. This please help doctor.

I am 17 yrs old male and have been doing masturbation from 5 years now from last 3 years i am trying to control it through self control but every time i have failed. i always watch porn. i have ordered a chastity lock to control that but the lock created pain that's why i removed it. after 3 years of trying to control masturbation. i thought for a while and noticed that i always masturbate after 4 or 5 days every time before that my mind does'nt arouses for masturbation. now what i think that my body has adopted it to masturbate after 4 or 5 days or some hormone problem of fsh or something else is there in my body. everytime i try to control a sexuall feeling comes which destroyes my self control. i googled for some medicines which are staphysagria q5 ustilago q or 6 galeo cerdo cuvier hepar 30 c so can i take any of these or if you can prescribre any to get rid of this. i am suffering very badly from this please help doctor.