Switch from low to peak fertility possible when you start testing after increase of estrogen hormone?

Dear Clearblue Team, I have a cycle of 23-26 days. Last month I stated testing on day 7. On days 10, 11 and 12 I had the flashing smile and on day 13 the remaining smile for peak fertility. Two months before I had also tested and the peak fertility was also shown on day 13. This month, I only started testing on day 10 and during the last three days only low fertility was shown. As tomorrow is day 13 I don’t think that I will still get the flashing smile as it is too late already. So my question is, when the estrogen hormone has already increased by the time you start testing, is the test then not be able to detect it anymore and shows continuously low fertility instead until peak fertility is detected? If yes, can I be sure that the test will switch from low to peak fertility when the LH hormone rises? Thanks for your soonest feedback!