There are two things i can think of to cause this, the first is maybe youre like me with this pregnancy everything with a stong odor that i eat ie onions gives me body odor- thanks to lovely hormones:) or you have bacterial vaginosous i know i didnt spell that right but thats what one time caused me to have a cheesy smell. See your doc again if it doesnt clear up maybe they can retest you for infection.. Best if luck!
I believe you would be more sensitive to the smell because, a: you kow your body, its functions and its general hygeine and b: because you are pregnant you have a heightened sense of smell. The only thing i can recommend is maybe changing soaps or using fem fresh wipes, but if no one else can smell it try not to let it bother you too much.