Erection problem at a young age

Patient: Im 16 years old and i used to masturbate daily for about 3 years ages 13-16, but recently ive stuggled to get an erection, so i thought it might have something to do with to much masturbation , so i stopped to masturbate often, so from once a day i have stopped to once a week, and then to once every 2 weeks, however i still struggle to get a full erection even when masturbating once every 2 weeks, im really worried please help

Doctor: