First cycle on letrazole- ovulation help??

Hi, this is my first cycle on letrazole. I took it from day 3-7 of my cycle, and did an ultrasound on day 13 of my cycle. The results showed the largest follicle being 1.4cm with lining of 4mm. The doctor said the follicle should typically get to 2.5cm for ovulation and an 8mm lining, so she said I will most likely have 4-5 more days.

It is now 7 days later, I am currently on cycle day 20 and I have been tracking ovulation for the past 7 days with no positive result. On the digital it has been showing high fertility (flashing smiley) for the past few days but still no positive.

I have PCOS so this is not abnormal for me to ovulate late, but Ithought on letrazole it would be different.

Anyone experience something like this that can give me feedback/insight? Will I still ovulate just late? Any info or previous experience like this would be great. Thank you in advanced!