Problems working GLOW

Tara • Happy wife and mother to a beautiful baby girl born 09/15!
Hi ladies! For some reason I cannot adjust my period days on the app. I usually skip it but I am going to let myself have it these next two months that I am on the pill before I get off of the pill. Anyone know how to fix it? All the numbers are gray so I can't tap on them. Thanks!!
​Tara