If I just got off birthcontrol this year (I've been off for 4 months now) I've been TTC  my first cycle was 12 days (from beginning of period to day before next period) then the cycle after was 16 days , then the cycle after that was 21 days now this cycle is late ( I was suppose to get it on the 19th) but only according to glow.. If my cycle is regulating , then does that mean my ovulation days could move ?