Based on this chart?

Hannah • 25, Christian. Married to my best friend. Baby girl due May '18 :)
Hi, although I'm not technically trying to conceive I thought it would be the best place to post this. Based on this chart is it possible I'm pregnant? Yesterday I had a brown discharge and light cramping and I never spot before my period. And it probably sounds weird but I use Glow, Kindara, and Ovia lol. Thank!