okay so i’m 19 years old. A couple of months ago my vagina was very itchy and painful i took some antibiotics & it helped for a while, i’ve been having some green/yellowish discharge for months now & i’m so scared that i might have an STD cause i used to have sex frequently before all of this. is there anything I can get from walgreens that can make the discharge disappear? I can’t really tell my dad about this cause he doesn’t know that i started having sex yet