No period. Wonky one last month

Courtenay ~♡ttc, waiting for my 🌈♡~ • ~Just when the caterpillar thought the world was over, it became a butterfly~

So July's AF was brown blood. I think I had 1 heavy day and clotty. I know it's my lining being shed. I'm due for my period today according to one app and glow says 10 (which would make this cycle 35 days) I'm usually 27 or 28 days. 4 BFN. So confused.