Vinegary smell when working out

Es

I sometimes have a mild vinegar smell from my vagina. However when I workout *sometimes* and wearing workout leggings the smell seems quite intense. Just that if I sniff close enough I can smell it through my leggings. And when i take my leggings off I can smell it on them. (It’s an intense workout but idk.)

Is this normal?-

Also I’m on the contraceptive pill xx