Funky Smell Down There 😁

I am 15, I lost my virginity to my boyfriend, yes, I know, young, but my vagina has always smelt good, like healthy, but these past 3 days the smell became sour. Almost like a fishy smell. Its not as strong as it was 2 days ago, but its still kind of there. My boyfriend noticed and told me, and it was a little embarassing. Any rememdies to help clean the smell up?