Way out of sync-unhappy

I used to find this app very useful at predicting my period. However this past month it started showing my period being the same time as ovulation. It also told me my period was expected earlier than normal so when the app told me my period was coming I didnt get it. It came five days later. Not good for someone whos been TTC.

readallaboutit about iPeriod Lite Period Tracker, v3.7