Expert Q & A Answers About recurring UTI

Why won't my bacterial vaginosis infection go away?

I’ve had a bacterial vaginosis infection and a UTI in the last two months. After I finished those medications, I had a sore abdomen and lower back. The doctor said I still had bacteria in my urine so I’m taking more antibiotics...but I don’t feel any different. I’ve been tested for chlamydia, syphilis and gonorrhea but those came back negative. What could be causing these recurring problems?