So I occasionally have an irregular period, but for the past couple months I’ve been using the…

So I occasionally have an irregular period, but for the past couple months I’ve been using the PeriodTrackerLite app and it’s been spot on to the day. I was supposed to get it yesterday, but I didn’t. I had a couple small cramps. And a migraine. I don’t remember having sex during my ovulation this month. So hopefully I get it today.