I assume somewhere along the way the doctor has looked
for a forgotten tampon? Have you had an ultrasound or
a uterine MRI? Have they checked you
for a white count that would indicate an infection? Have you had the same sexual partner throughout, such that if you have BV and get treated, he could be giving it right back to you? (Your partner needs to be given the same antibiotic as you, at the same time, to break this chain.