Vaginas are supposed to have a smell. That's the sign of a healthy vagina.
However, if you find that your smell is really stinky and strong (like people can smell you from a few feet away when you are fully clothed

), then you should ask your ob-gyn about it. Why would you be nervous to ask an ob-gyn? I am sure they have seen and smelled some crazy stuff.

No matter how bad your issue is, it's usually safe to assume your ob-gyn has already seen worse. So there's never a reason to be embarrassed.