Could it be?

Dolores • 25 👧 My family is my world ❤ 💙 R.I.P my little angels 5-29-13 👼 8-31-19 👼. Everything happens for a reason 💕 ❤💙
Its my first month checking my BBT and according to ovia im in my fertile wimdow but in glow im not could ot be? And im in cycle day 17 plus periods are irregular whats going on