I HAVE ALWAYS HAD A REGULAR PERIOD SOMETIMES LATE AND SOME TIMES ON TIME NOW I JUST HAD A PERIOD WITH VERY PAINFUL CRAMPING AND VERY LIGHT PINK BLOOD FOR THE FIRST DAY TWO DAYS WENT PAST NO BLOOD THEN THERE WAS A LITTLE REDISH BLOOD THE THIRD DAY AND NOW AT THE END OF MY CYCLE WHICH USAULY LAST 6 DAYS THERES VERY DARK BROWN UNUSUAL DISCHARGE PLEASE HELP ME TO NO WHATS GOIN ON