Don’t know what to do :(

So for some time now there’s been an imbalance w my vagina.. if that makes sense. I’m almost positive it isn’t any type of std since the only person I’d ever have sex w was my boyfriend (ex now) i believe it started after we used a flavored condom. Not even thinking what it’d do to my girl down there. Lol. Anyways , I.T has a sour smell to it and when i sweat alot the Odor gets stronger . Also a lot of discharge (yellow and/or white). I WANNA go to a gyno but my mom doesn’t know i have sex (I’m 17) idk how to tell her without breaking her heart. Are there any over the counter pills i can take? Or any home remedies ?