16 HELP❗❗❗❗❗

I'm 16 (will be 17 in a month) , I've been sexually active since I was 14. I have had 3 partners total.. (everything is protected) well for the past 6 months I've been a bit more dry than usual........ I don't understand why. I go to the doctor every 3 months for STI screening & birth control.. but my doctor won't even talk to me about this problem even with my mother's consent !! Any ideas plz???