Flashing Smiley past 9 days and irregular cycles.

Hi there, I have a question about the Advanced Ovulation Kit. I am 35 years old, not on any fertility meds. My cycles had been on like clockwork up until June when I had a very early miscarriage. Since then my cycles have been irregular ranging from my normal 30 days up to 41 days. This month, I began testing with the OPK on CD11. On CD18 I got a flashing smiley and have continued to get the flashing smiley for the next 9 days (up to CD26 now) and not a Peak indicator at all. I suspect that I did not ovulate this month as I have been temping and charting CM as well and have not had a temp spike. I have read and re-read the instructions about if you see more that 9+ High Fertility days and want to clarify further. My question(s) is, if I have not ovulated this month, will the Advanced OPK still continue to show the flashing smiley if I were to continue testing past the 9+ days? Will the test go back to the empty circle eventually if i have not ovulated? I know the instructions say you can stop after 9+ days of High Fertility but no Peak. I hate to waste the sticks unnecessarily, but on the flip side, I don't want to miss out on a possible late cycle ovulation. Suggestions would be appreciated. Thanks.