What Causes Delayed Periods After Taking Diane 35?

HI I TOOK DIANE 35 FOR THE FIRST FROM THE START OF MY PERIOD WHICH LAST 7 DAYS STARTED TO GET WITHDRAWAL BLEEDING AND WAS CONFUSED BECAUSE MY DOCTOR TOLD ME NOTHING OF THIS. I GOT A NEW PERIOD WHICH STARTED RIGHT AFTER THE WITHDRAWAL BLEEDING. THIS WHOLE PROCESS LASTED 24 DAYS. I AM NOW PERIOD FREE. MY QUESTION IS I HAVE PASSED THE 7 DAY BREAK FROM THE PILL AND MY PERIOD HAS NOT RETURNED YET SHOULD I START TO TAKE THE PILL AGAIN BECAUSE IT HAS REACHED THE 28TH DAY AS OF YESTERDAY?