Embarrassing question

I am 25 and I am currently ttc with my first. I was a virgin until getting married. My husband was a virgin as well. As long as I can remember I have had a often unpleasant smelling vagina. Even back in early high school when I hadn't even kissed a guy yet. Now that I am having sex my vagina odor is worse. After my husband ejaculates I smell like fish for a few days. I am a very clean person. I shower at least once a day. I have been tested for BV at least 2× and both have been negative. My doctor even gave me medicine for BV and it didn't help. So my question is, if it isn't BV then what is it? Is it normal for some people just to have an unpleasant smell?