I get periods flow for 3 days normally and I’ve 26-28 days cycle . I feel stressed to use opk so I want to do bd every other day. My questions is should we start just next day of flow ends (like on 4th day of periods) but I do get little bit of spotting on 4th and 5th too sometimes . Or we should wait till 6th day of periods to start . Then till which date we should do ? Ovulation day as per glow ? Whole month (which is hard ) or 2-3 even after ovulation date as per glow .