My period was suppose to start on the 20th according to glow. I usually start it when it predicts MAYBE a day later but that's it. I still haven't started it but tested negative yesterday. I updated glow saying my period was late and it pushed it back saying it will start on the 26th. If it doesn't come the 26th is glow just going to keep pushing it back? When will I know if I actually missed my period this month? Am I suppose to just wait until next month to see if the next one decides to come?