if you are really worried or if the smell gets worse see a doc and make sure its not an infection of some type. As the previous person said soaps can be the problem, and never douch because it puts you at higher risk of yeast infections...no perfumes either
My gwn told me years ago that chemicals in soap can react to your vaginal smell. For me lever 2000 and Irish spring were my culprits. Try changing your soap. Cut to the chase and try a natural one and see if that makes a difference.