vagina smell while sick

Every time I get sick, whether it's a cold, the flu, stomach bug, my vaginal odor changed. It starts to smell slightly bad. It's never bv or any type of yeast infection, it's just an odd kind of off putting smell and it happens every single time I get sick, especially if a fever is involved. It always goes away as soon as I'm feeling better. Does anyone else experience this? Right now I have a bad stomach bug and it's making me feel a million times grosser than I already do!