I started using the clear blue opks that predict 4 fertile days. I started using it a bit late in my cycle. I got negative for a few days, but have now has flashing smilies for four days in a row, but no static! Day 23 of my cycle now, I do have longer cycles (35 days not unusual) but this is pretty late now not to be ovulating yet, and I thoughg the opk was supposed to give two flashing smilie days then two static? Has this happened to anyone else? Am I just not ovulating this month?