HI I AM ON THE PILL 4 YEARS NOW AND I RECENTLY STOPPED FOR NO SPECIAL REASON FOR 1MTH AND THEN STARTED BACK,MY PERIODS CAME ON THE SAME DAY I STARTED AND IT'S 8 DAYS SINCE I STARTED MY NEW PACK AND STILL HAVING SLIGHT BLEEDING. WHAT COULD BE THE REASON FOR THAT AND HOW LONG SHOULD THE BLEEDING LAST? MY PERIODS NORMALLY LAST 5 DAYS.