has this ever happen to anyone

According to this app today is my highest chance to get prego.. I've been having sex everyday and today Idky but decided to take a ovulation test and to my surprise is said I wasn't ovulating or low fertile window something like that.. I used clear blue advance. I kinda feel stuck. I had a miscarriage in May and my period has been different since December.. this is so frustrating. Has this every happened to anyone ??