I am use to starting my period on the same day each month so i thought i sort of knew what day my period should start but this is my second month off the pill and if i was right i was 2 days late looking at next month where glow says i should start my period is a completley different day again is this normal? I feel like i dont know which day i should get my period and dont want to think im late if im not anyone else had this problem?