​I woke up today and no AF so I went into Glow and tried to change my period end date from today to yesterday however it wasn't letting me. So, I deleted the period and tried to readd it with yesterday as an end date, which didn't work. Then, my whole cycle and prediction got screwed up. It's now saying I am fertile starting tomorrow (as opposed to 4/14 which is what it was saying prior) and it is saying I have an 18 day cycle. I can't seem to fix it, so I emailed Glow Support. 

​But, I really wish there was a different way to edit periods. 

​I don't find the period log to be very user friendly as much as I like the rest of the app. :/