Hello, * The lower back pain and brown vaginal discharge are more likely in concern with vaginal infection and underlying bacteremia causing low-grade fever or malaise to pause the symptoms narrated here. Kindly get a vaginal swab report done at microbiology lab for further guidelines of antibiotic therapy. Till the time, you can follow certain measures for better recovery as - drink more liquids - keep the genitals clean with antiseptic liquid and dry - wear loose, cotton inner wears - avoid penetrative sex (if active) - discuss the need for antifungal medicines with your doc when you discuss the culture report as well. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Bhagyesh V. Patel, General Surgeon