Lower back pain occurs in the lower back and often feels like a dull ache. The symptom of abnormal vaginal bleeding is linked to: cervical cancer, uterine. Jun 19, - Your doctor may prescribe an antifungal treatment if your low back pain and vaginal discharge are due to a yeast infection. These treatments can include pills, vaginal creams, and vaginal suppositories. Your doctor may prescribe a medication called Flagyl if you have a bacterial infection known as bacterial vaginosis.