So <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> has had my period down to the day since January. Well last month in May my period was late by a day and this month I'm 4 days late with 30 days into my cycle I took a pregnancy test on the 2nd missed day but said not pregnant could anyone give me some insight I have never been late but have had longer cycles bf never late