Chart help!

Mari • Pregnant with our first! ❤️
Ladies, when I put my temperature into Glow and Fertility Friend this morning, FF gave me crosshairs and said I ovulated on CD 8. No idea if I did because I have been using Wonfo OPKs and have not gotten a positive from them yet. Is it possible to get negative OPKs but yet still ovulate? 
​My times for bbt vary within an hour or so, especially last week since I had to work and earlier shift. Glow has not said I've ovulated yet. I'm on CD 14 today. Thanks for your help!!