I AM 44YRS OLD AND A WOMAN, I HAVE BILLIRUBEN

I AM 44YRS OLD AND A WOMAN, I HAVE BILLIRUBEN IN MY URINE! BUT ALL MY LAB WORK IS COMING BACK IN RANGE. I SUFFER FROM CHRONIC NECK AND BACK PAIN WEN I SLEEP, DONT KNOW WHY. SO , AS I WAS SAYING WHEN ALL MY BLOOD WORK WAS DONE THE URINE TEST CAME BACK NORMAL WITH JUST A TRACE OF LEUKOCYTE ESTERASE. IM VERY CONCERN ABOUT THIS. I AM NOT A DRINKER, AND WHAT I MEAN BY THIS IS I VERY SELDOM HAVE A DRINK AND WHEN I DO MAYBE TWO AT THE MOST TWICE A MONTH. IM JUST NOT A DRINKER AND NEVER TRIED DRUGS IN MY LIFE. I AM REALLY SCARED ABOUT THIS ALL THE TIME ITS ON MY MIND. I AM A PHLEBOTOMIST HAVE BEEN FOR 21YRS AND I READ AND HEAR SO MANY BAD STORIES AS YOU KNOW. PLEASE HELP ME