I don't know what to believe

Amanda • My husband and I have been trying to conceive for 3 1/2 years now. Here`s to never giving up!
Last cycle I used an equate brand ovulation kit and was told that it read positive for ovulation on a post I shared here. It was suggested that I use a red dye test instead, so this time I used first response fertility. I've been testing since Friday (cycle day 10) and every day has been negative. So today (day 14), I used both the equate and first response fertility tests to test for ovulation. I've attached a picture. The equate one looks very similar to the way it looked last cycle on day 14, but the first response test it's clearly negative. 
I've been taking Letrozole for 2 cycles now, and I thought I ovulated last cycle, but if I didn't I need to let my fertility specialist know asap. 
Any advice will help!