I used them when I was half way my cycle or when my discharge increased and that worked. Not need of using 20 tests a month
I’ve started testing the day after my period ended. I’ve been testing once a day and then twice a day once I entered my predicted fertility window! ☺️
I’d say test the first day after your period ends. Or if that’s already gone start now. Not sure if you’ve used tests before but best pee is 2nd morning urine with no liquids between first and second. Test once a day until they start to get darker then do 2 or 3 times x