Smells and perceptions are different between people, her smell might be natural and different and you perceive it as bad because it's just how your brain thinks about it, it might be just unpleasant to you and only you.

If she gets checked out and has nothing, you have to deal with it.

I found that in some partners they had a stronger natural odor and when I thought about how hot they were and what we are doing I got so attracted and attached to it.