MY PERIODS HAVE BEEN REGULAR FOR THE LAST 20 YEARS, LAST MONTH IN JAN MY PERIOD WAS ONLY ONE DAY AND VERY LIGHT. THIS MONTH I HAD WHAT SEEMED TO BE A PERIOD BUT WAS MAINLY BROWN SOME DARK RED BUT MOST BROWN LASTED ABOUT 4 DAYS. I HAVE TAKEN PREGNANCY TEST BUT ALL ARE NEGATIVE I HAVE TERRIBLE HEARTBURN , VOMITING , CONSTIPATION , FATIGUE AND SORE BREASTS AT NIGHT PLEASE HELP.