Never used these when I got pregnant with my first baby so very new to OPK but due to irregular cycles I started using the ClearBlue Advances OPKs on cycle day 6. The first two days were negative then since cycle day 9 I started getting the flashing smileys including this morning on cycle day 16 I got a flashing smiley. In conjunction with the ClearBlue I started using just some internet ones just to make sure. This was this mornings test. Do you think a surge is approaching? I’ll be taking another one this afternoon as I don’t want to miss ovulation and it would be nice to know when I could potentially ovulate. It would help in case I didn’t get pregnant this month to have a better idea of what my body does each month.