I usually have a normal 28 day cycle, last month my period was due december 24th, but it came a week early, December 18th. It was a rather unusal period, super light didn't even fill a pad a day. Bled for two days then just spotted on and off. I ovulated January 6th and my period is due January 14/15. Should I still expect it then, the 28th day, or expect it 14 days after ovulation?