Opinions I'm clueless.

Hi ladies , I'm now officially late on period. I ovulated late I think the pinkish purple box is when I had fertile discharge and I usually ovulate the same schedule as this app says but not this time and idk why. Anyways I tested Friday the 11th and this morning and both were negative and the early detection test thing. I'm never ever late for my period I'm every 28 days it now it's day 30... Can I get some advice what to do or something cause I'm freaking out this is Not normal for me.