Hi I had this for years and as you said you go to doctors and they say its fine , what I did was go to the family planning , they sent me to the GUM Clinic as they have better ways of testing you , I was told I was washing to much and had washed all the natural body odours ,so they give me a few pills and said don,t wash around inside of your private area as this self cleans it self , also do not put any thing into bath like bubble bath, I was out of my mind with this as you feel you going off your head , I could smell myself all the time, I would get out of bath with in ten minutes I could smell it again , now after the visit to the Gum clinic and some advice which no one had told me before I am fine , so do what I told you and go to the Family Planning first and get referred to Gum Clinic after , good luck , Bag pack
I recommend fasting. That is were im stuck i have a bad smell but fasting lessens it a little enough. I dont know what to tell my doctor. Since they dont recommend fasting they recommend clean diet.
BV can reoccur so since you said you often visit your doc for this and your tests shows negative, then i do not know what else it could be. Maybe it just takes a while to get rid of the smell and maybe the hair grease is still hanging out in your vagina and has turned bad. This will not develop into HPV however so you dont have to worry about that. It's possible you may have some other kind of vaginal infection but like you said you visted your doc often so if nothing else shows during your examination then I wouldn not wait it out. If the smell gets worse or does not go away after a long time, then get a 2nd opinion else where. sorry to hear your stressed over this.