Is this normal?

So every single time after my period until I'm in my fertile window my vagina has a foul odor. Iv been to my gyno and have been check for everything cause I was worried and everything came back negative. I don't use anything fancy to wash down there just water and a wash cloth sometimes I use odorless bar soap. I just don't understand and it's so embarrassing. I was just wondering if this happens to anyone else?!