So i’ve been using OPKs for the first time this month. My question is how vital is it to do it at the same time every day. I have done mine at various points in the last 5 days due to working shifts.I think my line is getting darker but i have never seen a peak yet :( according to my app i have just finished my fertile window. Have i missed it or will i keep POS for a few more days?! Here’s a pic of my results so far! Any help would be appreciated! x