Tracey Help ??

ok I started my cycle AF on July 22 IT ended 26 ... I started my ovulation test on 26 soon as AF ended .. and been test up until today still no Positive just yet when do you guys think I should be ovulating .. GLOW say the 29-August4 but Ovia App say I start being fertile on August 3-8 help should I keep testing I know last month I got my positive soon as AF ended what's taking this long now ​