Embarrassing question

I have a pretty embarrassing question.. Well here it goes.. I have never had a proble or issue with smelling down there.. Well, for the last week or so my self and my husband have noticed that I am smelling.. And I am not sure why? The only thing I can think of that I have changed here recently is I have started taking prenatal vitamins ( for before, during, and after) pregnancy.. I didn't think it would hurt to take them since we are trying.. Do any of you ladies know if this could be the cause of my embarrassing problem.. And I do mean it is embarrassing!!!