Welcome to Healthcare Magic.
I am Dr Ramadevi Wani. I will be answering your concerns today.
It is good to know that you are tested negative for STD's
From your notes it appears that you have bacterial vaginosis
infection. It occurs due to disturbance in the balance of normal vaginal organisms. There is overgrowth of anaerobic organisms in this condition. It is not clear why it occurs. Vaginal douching is one of the trigger factors. Have you been tested and prescribed medicines for Bacterial vaginosis. You have not mentioned about this. So I am asking.
About 20% of them do not respond. In that case you need to consult doctor
and use a different antibiotic. While on medicines, do not have sex or use condoms during sex.
Bacterial vaginosis can sometimes be persistent even after 2 courses of treatment. In that case your doctor will prescribe you suppressive treatment for few months.
Do not use douches, perfumes, etc.
Use loose cotton garments.
Eat healthy diet and take multivitamins to boost your immunity.
I hope this is helpful.
If you have further concerns, I will be happy to answer.