AF due 2/19, per glow...

Breanna

Per Glow, AF is due 2/19, but I started brown spotting late last night. Tonight, still brown spotting, and cramping, on and off. WTF?! Is the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> off?!?