Help please

Hello guys I have been tracking to see when my ovulation test will finally pop up positive however I took these today and one says yes and the other says no. I did have a bbt of 98.2 today and I will continue to keep testing for the other brand. I did take letrozole this cycle and have been monitoring it since 1 day after my last pill. I am on cycle day 14. I know what a positive opk is but any advice guys? For the clear blue I have had flashy smiley faces for about 5 days now. It has just barely stopped today.