What Causes White Vaginal Discharge And Lower Abdominal Pain?

I have had white vaginal discharge for a while now but recently its become heavy and runny, i had a miscarriage 2 months ago and i already had cysts on my ovaries. I've had a swollen stomach and lower back and low abdominal pain for the past week. The doctor told me that they found white blood cells in urine, this time they have found red blood cells and they asked me to do another urine test i've already done 6 and they all came back with same result,what could this be? could it be cervix problem or more likely to be kindeys or urinary system?