What Causes Metallic Smell For Discharge With Bitter And Sour Taste?

So I am 15 (3 months shy of 16) and I have had this weird problem for 10ish months or so now. See I have discharge, and through internet searching I have learned that discharge is normal. The only problem I have is, the discharge smells metallic, almost as like copper or something. You can only smell it if you get it a few inches from your face. I have done many searches but never end up with answers, I do not have a high Iron level I am slightly anemic. I do take medicine for ADD, I take adderal and before that I took Straterra. I have been on and off various types of birth control pills since I was 13, due to very painful periods. I have had sex with one guy more than once, but I am not sexually active and havent been for a while. Also the discharge tastes gross (I noticed it stunk so I decided to taste it) its really bitter and sour. I cant go to a doctor, I was sexually assulted as a child and am TERRIFIED of anyone messing with my girl parts. PLEASE HELP!