what should i tell my dad and my bf?☹

Im 100% sure i have a yeast infection. i have a nasty smell down there and there is white chunky discharge down there. I am 15 and also sexually active and I'm kind of scared about telling my bf about it, I don't want him to think I'm gross or anything.. Im very hygenic especially when it comes to my coochie. I'm kind if prone when it comes to yeast infections in the summer because my coochie sweats and the kind of underwear i wear just stays moist and doesn't absorb anything. I need to see the doctor but i only live with my dad and I'm so embarrassed and scared to tell him so he can make an appointment. I don't know what to do ☹