What Causes Delay In Periods And White And Pink Discharge?

I AM 19 YEARS AND I AM MARRIED LAST 9 MONTHS BACK ......I MISSED MY PERIODS THIS MONTH AND TODAY IS THE 13 DAY ..... AND TODAY FROM MORNING I M HAVING WHITE STICKY FLUID AND VERY LITTLE RED DISCHARGE ALSO WITH IT WHEN I AM PASSING URINE ....... LAST 5 DAYS BACK WHEN I TOOK PREGENENCY TEST IT WAS NEGATIVE AM I PREGENENT DOCTOR