I went to doctors beginning of week ,I took a urine sample as I was tender on left low side ,there wer white cells and blood in the sample but not enough for infection ,the sample got sent to the lab its come back clear .I have had diarrhoea,butnot after eating just once to twice a day sometimes 5 times a day .I have lower backache and im very tender to touch pelvic area ,what could be wrong