False negative yeast tests?

I have cottage cheese discharge, itching / burning, shooting pains in vagina and yeast discharge around my labia yet whenever I get tested at the doctors, “no yeast”! It literally even smells like baker’s yeast. I’m also on antibiotics which are notorious for causing yeast infections. What could this be? Also, is it possible to have a yeast infection the swab doesn’t pick up? They don’t ever swab my vagina, they only open and swab my cervix which makes me think maybe the yeast is in my vagina and is not being picked up.