Vagina Hurts

Im 15. i don’t even know how to say this. the day after my period I went to pee and I noticed I had discharge. Bc of the whole Corona Virus, Ive been taking a lot of vitamins( I don’t exactly know what they are tbh)and i thought what’s happening to me is bc of this. But the point is my discharge smelled funny. It smelled like fish but at the same time it didn’t ?? It’s a few days later and my vagina is still giving off this odor minus the discharge. and if there is discharge it’s like normal, just with the smell. I noticed it got better but now the smell is more like old piss ? and not the outside of my vagina is burning pls help me.

the only thing i can say is i’m not sexually active. i choose to take care of myself. i have been masturbating a lot. and i decided to use a brush to masturbate while on my period and off. and i dunno could that have caused this. i made sure to wash the brush w proper body soap and it was gentle with little smell. just someone help pls