HI, MY CYCLE CAME ON FOR A DAY. IT WAS VERY LIGHT AND IT SPOTTED THE NEXT DAY THEN IT WAS GONE. IT USUALLY LASTS 6 TO 7 DAYS . FOUR DAYS LATER I WENT TO THE LAVATORY AND  IT WAS ONE DROP AS IF MY CYCLE HAD JUST COMPLETELY WENT OFF. I HAD A TUBAL LIGATION  8 YEARS AGO. MY BREAST ARE SORE AND MY STOMACH LOOKS TO GETTING BIGGER. ALSO, THE VERY BOTTOM OF MY STOMACH IS SORE. WHAT COULD THIS BE?