Good morning, Mrs,
I would like to reassure you that a certain odor does not necessarily indicate a problem, especially if you have already consulted a doctor about it and a problem has been ruled out.
Odor is analogous to perspiration, and can depend on the time of day, diet, daily activities (e.g. sweating), and can even vary through the menstrual cycle.
The first thing to focus on is non-pharmacological measures, if this has not been tried:
Ensure basic hygiene with water only. Vagisil-type products and vaginal douches should be avoided.
I suggest wearing clothing that is not tight and allows for breathability, such as cotton clothing and underwear.
You mention presenting this for some time. If there has been a recent change in odor, and/or any other new symptoms, it would be prudent to consult a physician.
I hope this has been helpful, and if you have any further questions, please don't hesitate to ask!
Tom Samaha, pharmacist