U should find out which says UR ovulating the start then that's what I did. I have a app called ladytimer it lets me know when my periods come and when I'm ovulating. And I'm 11w now THX to that! It tells u the days U ovulate every month so U can start on those days.
Ovulating...the best is right after your cycles leaves..thats how I did it...the first 5 days after your cycle is the best!!! Wish u all the luck.
Try the ovulation strips.