When I was 7 months pregnant I was rushed to emergency with severe left flank pain
. It was determined that I had kidney stones
. Approximately 2 years later, it happened again, only on the right side. There was blood in my urine, my white blood cell count was elevated, and severe pain again. An ultrasound found imflamation, thus my doctor determined I had an infection and was prescribed antibiotics. However, I still have mild (throbbing/aching) flank pain on my right side.