Hi! I am confused.... I went off the pill aug. 9th, I got a period sept. 16th-18th.  It was REALLY heavy the 16th, then got lighter by the next two days! Glow says I won't get another period till the 24th of oct. But my other two apps say it is due tomorrow. I took a test yesterday afternoon and it was negative.... Could it be too early? Or I am probably not pregnant???