It could be a bacterial vaginosis.. or maybe a yeast infection. When you wash your lady part.. Do you clean the inside? Many ladies do, and this is a BIG no-no. This can cause a disruption of your normal good bacteria in the vagina, thus causing a bacterial vaginosis or a yeast infection. Wear cotton panties and loose fitting clothing to make yourself more comfortable. Plus cotton undies makes the area down there able to breathe so it would be less likely to get a yeast infection or anything. Don't use douches either as they are harmful as well. The odor you are smelling most likely is just from the sweat though.. This sounds more likely to me.. Some women sweat more than others, hun.
Anyways, be sure to stay away from douches, don't wash the inside of your vagina, wear cotton underwear and pants that aren't skin tight and bathe daily.. This should help some of the odor. (baby powder can help too.. just a small amount to absorb the moisture)
Good luck and congrats on your upcoming wedding dear!
I don't do that, so could it still be bacetraial vaginosis or a yeast infection?